diff --git a/src/compiler/factory/emitHelpers.ts b/src/compiler/factory/emitHelpers.ts
index f5feb09e5e5..e198c123f30 100644
--- a/src/compiler/factory/emitHelpers.ts
+++ b/src/compiler/factory/emitHelpers.ts
@@ -1403,7 +1403,7 @@ export const addDisposableResourceHelper: UnscopedEmitHelper = {
     text: `
         var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
             if (value !== null && value !== void 0) {
-                if (typeof value !== "object") throw new TypeError("Object expected.");
+                if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
                 var dispose;
                 if (async) {
                     if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/src/testRunner/unittests/evaluation/usingDeclarations.ts b/src/testRunner/unittests/evaluation/usingDeclarations.ts
index 11100c95280..701daf7208f 100644
--- a/src/testRunner/unittests/evaluation/usingDeclarations.ts
+++ b/src/testRunner/unittests/evaluation/usingDeclarations.ts
@@ -1658,4 +1658,29 @@ describe("unittests:: evaluation:: usingDeclarations", () => {
             "after block"
         ]);
     });
+
+    it("'using' for 'function' disposable resource ", () => {
+        const { main, output } = evaluator.evaluateTypeScript(`
+        export const output: any[] = [];
+
+        function disposable() {
+            const f = () => output.push("enter");
+            const d = () => output.push("exit");
+            return Object.assign(f, { [Symbol.dispose]: d });
+        }
+
+        export function main() {
+            using run = disposable();
+            run();
+        }
+
+        `, { target: ts.ScriptTarget.ES2018 });
+
+        main();
+
+        assert.deepEqual(output, [
+            "enter",
+            "exit",
+        ]);
+    });
 });
diff --git a/tests/baselines/reference/awaitUsingDeclarations.1(target=es2015).js b/tests/baselines/reference/awaitUsingDeclarations.1(target=es2015).js
index 0d1aa5282bb..704d04dd43c 100644
--- a/tests/baselines/reference/awaitUsingDeclarations.1(target=es2015).js
+++ b/tests/baselines/reference/awaitUsingDeclarations.1(target=es2015).js
@@ -111,7 +111,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
 };
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/awaitUsingDeclarations.1(target=es2017).js b/tests/baselines/reference/awaitUsingDeclarations.1(target=es2017).js
index 9732d266f7f..90b68228db0 100644
--- a/tests/baselines/reference/awaitUsingDeclarations.1(target=es2017).js
+++ b/tests/baselines/reference/awaitUsingDeclarations.1(target=es2017).js
@@ -102,7 +102,7 @@ export {};
 //// [awaitUsingDeclarations.1.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/awaitUsingDeclarations.1(target=es2022).js b/tests/baselines/reference/awaitUsingDeclarations.1(target=es2022).js
index 41ca069585c..2cd219cdd24 100644
--- a/tests/baselines/reference/awaitUsingDeclarations.1(target=es2022).js
+++ b/tests/baselines/reference/awaitUsingDeclarations.1(target=es2022).js
@@ -102,7 +102,7 @@ export {};
 //// [awaitUsingDeclarations.1.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/awaitUsingDeclarations.1(target=es5).js b/tests/baselines/reference/awaitUsingDeclarations.1(target=es5).js
index 7d7ec33b23b..296356438e9 100644
--- a/tests/baselines/reference/awaitUsingDeclarations.1(target=es5).js
+++ b/tests/baselines/reference/awaitUsingDeclarations.1(target=es5).js
@@ -138,7 +138,7 @@ var __generator = (this && this.__generator) || function (thisArg, body) {
 };
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/awaitUsingDeclarations.2(target=es2015).js b/tests/baselines/reference/awaitUsingDeclarations.2(target=es2015).js
index 03565e6b338..ac277978edc 100644
--- a/tests/baselines/reference/awaitUsingDeclarations.2(target=es2015).js
+++ b/tests/baselines/reference/awaitUsingDeclarations.2(target=es2015).js
@@ -20,7 +20,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
 };
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/awaitUsingDeclarations.2(target=es2017).js b/tests/baselines/reference/awaitUsingDeclarations.2(target=es2017).js
index ab37b86fcec..33a940df872 100644
--- a/tests/baselines/reference/awaitUsingDeclarations.2(target=es2017).js
+++ b/tests/baselines/reference/awaitUsingDeclarations.2(target=es2017).js
@@ -11,7 +11,7 @@ export {};
 //// [awaitUsingDeclarations.2.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/awaitUsingDeclarations.2(target=es2022).js b/tests/baselines/reference/awaitUsingDeclarations.2(target=es2022).js
index ab37b86fcec..33a940df872 100644
--- a/tests/baselines/reference/awaitUsingDeclarations.2(target=es2022).js
+++ b/tests/baselines/reference/awaitUsingDeclarations.2(target=es2022).js
@@ -11,7 +11,7 @@ export {};
 //// [awaitUsingDeclarations.2.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/awaitUsingDeclarations.2(target=es5).js b/tests/baselines/reference/awaitUsingDeclarations.2(target=es5).js
index e9a87c08a11..1bff5fb3657 100644
--- a/tests/baselines/reference/awaitUsingDeclarations.2(target=es5).js
+++ b/tests/baselines/reference/awaitUsingDeclarations.2(target=es5).js
@@ -47,7 +47,7 @@ var __generator = (this && this.__generator) || function (thisArg, body) {
 };
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/awaitUsingDeclarations.3(target=es2015).js b/tests/baselines/reference/awaitUsingDeclarations.3(target=es2015).js
index 4b8939b215b..e21dc4c3a47 100644
--- a/tests/baselines/reference/awaitUsingDeclarations.3(target=es2015).js
+++ b/tests/baselines/reference/awaitUsingDeclarations.3(target=es2015).js
@@ -22,7 +22,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
 };
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/awaitUsingDeclarations.3(target=es2017).js b/tests/baselines/reference/awaitUsingDeclarations.3(target=es2017).js
index 2edb5db731e..b070220f5d8 100644
--- a/tests/baselines/reference/awaitUsingDeclarations.3(target=es2017).js
+++ b/tests/baselines/reference/awaitUsingDeclarations.3(target=es2017).js
@@ -13,7 +13,7 @@ export {};
 //// [awaitUsingDeclarations.3.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/awaitUsingDeclarations.3(target=es2022).js b/tests/baselines/reference/awaitUsingDeclarations.3(target=es2022).js
index 2edb5db731e..b070220f5d8 100644
--- a/tests/baselines/reference/awaitUsingDeclarations.3(target=es2022).js
+++ b/tests/baselines/reference/awaitUsingDeclarations.3(target=es2022).js
@@ -13,7 +13,7 @@ export {};
 //// [awaitUsingDeclarations.3.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/awaitUsingDeclarations.3(target=es5).js b/tests/baselines/reference/awaitUsingDeclarations.3(target=es5).js
index 2cc2c25f5f4..b198385d9c9 100644
--- a/tests/baselines/reference/awaitUsingDeclarations.3(target=es5).js
+++ b/tests/baselines/reference/awaitUsingDeclarations.3(target=es5).js
@@ -49,7 +49,7 @@ var __generator = (this && this.__generator) || function (thisArg, body) {
 };
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/awaitUsingDeclarationsInFor(target=es2015).js b/tests/baselines/reference/awaitUsingDeclarationsInFor(target=es2015).js
index 53a07f9602f..bca9ebbbe23 100644
--- a/tests/baselines/reference/awaitUsingDeclarationsInFor(target=es2015).js
+++ b/tests/baselines/reference/awaitUsingDeclarationsInFor(target=es2015).js
@@ -21,7 +21,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
 };
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/awaitUsingDeclarationsInFor(target=es2017).js b/tests/baselines/reference/awaitUsingDeclarationsInFor(target=es2017).js
index bbfca93a9c7..b8190e4b820 100644
--- a/tests/baselines/reference/awaitUsingDeclarationsInFor(target=es2017).js
+++ b/tests/baselines/reference/awaitUsingDeclarationsInFor(target=es2017).js
@@ -12,7 +12,7 @@ async function main() {
 //// [awaitUsingDeclarationsInFor.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/awaitUsingDeclarationsInFor(target=es2022).js b/tests/baselines/reference/awaitUsingDeclarationsInFor(target=es2022).js
index bbfca93a9c7..b8190e4b820 100644
--- a/tests/baselines/reference/awaitUsingDeclarationsInFor(target=es2022).js
+++ b/tests/baselines/reference/awaitUsingDeclarationsInFor(target=es2022).js
@@ -12,7 +12,7 @@ async function main() {
 //// [awaitUsingDeclarationsInFor.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/awaitUsingDeclarationsInFor(target=es5).js b/tests/baselines/reference/awaitUsingDeclarationsInFor(target=es5).js
index 1ba3ab31d94..61b4144ebb5 100644
--- a/tests/baselines/reference/awaitUsingDeclarationsInFor(target=es5).js
+++ b/tests/baselines/reference/awaitUsingDeclarationsInFor(target=es5).js
@@ -48,7 +48,7 @@ var __generator = (this && this.__generator) || function (thisArg, body) {
 };
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/awaitUsingDeclarationsInForAwaitOf(target=es2015).js b/tests/baselines/reference/awaitUsingDeclarationsInForAwaitOf(target=es2015).js
index 187f098c833..d9256e21a2b 100644
--- a/tests/baselines/reference/awaitUsingDeclarationsInForAwaitOf(target=es2015).js
+++ b/tests/baselines/reference/awaitUsingDeclarationsInForAwaitOf(target=es2015).js
@@ -18,7 +18,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
 };
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/awaitUsingDeclarationsInForAwaitOf(target=es2017).js b/tests/baselines/reference/awaitUsingDeclarationsInForAwaitOf(target=es2017).js
index 845789f9a5f..905825b1b30 100644
--- a/tests/baselines/reference/awaitUsingDeclarationsInForAwaitOf(target=es2017).js
+++ b/tests/baselines/reference/awaitUsingDeclarationsInForAwaitOf(target=es2017).js
@@ -9,7 +9,7 @@ async function main() {
 //// [awaitUsingDeclarationsInForAwaitOf.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/awaitUsingDeclarationsInForAwaitOf(target=es2022).js b/tests/baselines/reference/awaitUsingDeclarationsInForAwaitOf(target=es2022).js
index 1d6ca04cdf4..e440639100f 100644
--- a/tests/baselines/reference/awaitUsingDeclarationsInForAwaitOf(target=es2022).js
+++ b/tests/baselines/reference/awaitUsingDeclarationsInForAwaitOf(target=es2022).js
@@ -9,7 +9,7 @@ async function main() {
 //// [awaitUsingDeclarationsInForAwaitOf.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/awaitUsingDeclarationsInForAwaitOf(target=es5).js b/tests/baselines/reference/awaitUsingDeclarationsInForAwaitOf(target=es5).js
index 070dfbd4440..9f6518c1e03 100644
--- a/tests/baselines/reference/awaitUsingDeclarationsInForAwaitOf(target=es5).js
+++ b/tests/baselines/reference/awaitUsingDeclarationsInForAwaitOf(target=es5).js
@@ -45,7 +45,7 @@ var __generator = (this && this.__generator) || function (thisArg, body) {
 };
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/awaitUsingDeclarationsInForOf.1(target=es2015).js b/tests/baselines/reference/awaitUsingDeclarationsInForOf.1(target=es2015).js
index 3f34c45822e..f3e50b24326 100644
--- a/tests/baselines/reference/awaitUsingDeclarationsInForOf.1(target=es2015).js
+++ b/tests/baselines/reference/awaitUsingDeclarationsInForOf.1(target=es2015).js
@@ -19,7 +19,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
 };
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/awaitUsingDeclarationsInForOf.1(target=es2017).js b/tests/baselines/reference/awaitUsingDeclarationsInForOf.1(target=es2017).js
index a9555cf3fb0..80b040f2096 100644
--- a/tests/baselines/reference/awaitUsingDeclarationsInForOf.1(target=es2017).js
+++ b/tests/baselines/reference/awaitUsingDeclarationsInForOf.1(target=es2017).js
@@ -10,7 +10,7 @@ async function main() {
 //// [awaitUsingDeclarationsInForOf.1.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/awaitUsingDeclarationsInForOf.1(target=es2022).js b/tests/baselines/reference/awaitUsingDeclarationsInForOf.1(target=es2022).js
index a9555cf3fb0..80b040f2096 100644
--- a/tests/baselines/reference/awaitUsingDeclarationsInForOf.1(target=es2022).js
+++ b/tests/baselines/reference/awaitUsingDeclarationsInForOf.1(target=es2022).js
@@ -10,7 +10,7 @@ async function main() {
 //// [awaitUsingDeclarationsInForOf.1.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/awaitUsingDeclarationsInForOf.1(target=es5).js b/tests/baselines/reference/awaitUsingDeclarationsInForOf.1(target=es5).js
index d9514c078d9..84357ba7b9b 100644
--- a/tests/baselines/reference/awaitUsingDeclarationsInForOf.1(target=es5).js
+++ b/tests/baselines/reference/awaitUsingDeclarationsInForOf.1(target=es5).js
@@ -46,7 +46,7 @@ var __generator = (this && this.__generator) || function (thisArg, body) {
 };
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarations.1(target=es2015).js b/tests/baselines/reference/usingDeclarations.1(target=es2015).js
index c10bc21fb1f..aa195d8388e 100644
--- a/tests/baselines/reference/usingDeclarations.1(target=es2015).js
+++ b/tests/baselines/reference/usingDeclarations.1(target=es2015).js
@@ -165,7 +165,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
 };
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarations.1(target=es2017).js b/tests/baselines/reference/usingDeclarations.1(target=es2017).js
index f65b33bc977..39f415992d2 100644
--- a/tests/baselines/reference/usingDeclarations.1(target=es2017).js
+++ b/tests/baselines/reference/usingDeclarations.1(target=es2017).js
@@ -156,7 +156,7 @@ export {};
 //// [usingDeclarations.1.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarations.1(target=es2022).js b/tests/baselines/reference/usingDeclarations.1(target=es2022).js
index f5bf25b81c9..ec38bf090c2 100644
--- a/tests/baselines/reference/usingDeclarations.1(target=es2022).js
+++ b/tests/baselines/reference/usingDeclarations.1(target=es2022).js
@@ -156,7 +156,7 @@ export {};
 //// [usingDeclarations.1.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarations.1(target=es5).js b/tests/baselines/reference/usingDeclarations.1(target=es5).js
index 369559dff3a..82ffc544605 100644
--- a/tests/baselines/reference/usingDeclarations.1(target=es5).js
+++ b/tests/baselines/reference/usingDeclarations.1(target=es5).js
@@ -207,7 +207,7 @@ var __generator = (this && this.__generator) || function (thisArg, body) {
 };
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarations.11.js b/tests/baselines/reference/usingDeclarations.11.js
index 3cce2dda67f..449debe53d9 100644
--- a/tests/baselines/reference/usingDeclarations.11.js
+++ b/tests/baselines/reference/usingDeclarations.11.js
@@ -54,7 +54,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarations.12(usedefineforclassfields=false).js b/tests/baselines/reference/usingDeclarations.12(usedefineforclassfields=false).js
index 768b5142fd3..f1785f604cc 100644
--- a/tests/baselines/reference/usingDeclarations.12(usedefineforclassfields=false).js
+++ b/tests/baselines/reference/usingDeclarations.12(usedefineforclassfields=false).js
@@ -16,7 +16,7 @@ class C2 extends C1 {
 //// [usingDeclarations.12.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarations.12(usedefineforclassfields=true).js b/tests/baselines/reference/usingDeclarations.12(usedefineforclassfields=true).js
index 641d086c19e..10cc02241eb 100644
--- a/tests/baselines/reference/usingDeclarations.12(usedefineforclassfields=true).js
+++ b/tests/baselines/reference/usingDeclarations.12(usedefineforclassfields=true).js
@@ -16,7 +16,7 @@ class C2 extends C1 {
 //// [usingDeclarations.12.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarations.2(target=es2015).js b/tests/baselines/reference/usingDeclarations.2(target=es2015).js
index 66c7f0b962d..a3f08d13e52 100644
--- a/tests/baselines/reference/usingDeclarations.2(target=es2015).js
+++ b/tests/baselines/reference/usingDeclarations.2(target=es2015).js
@@ -10,7 +10,7 @@
 //// [usingDeclarations.2.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarations.2(target=es2017).js b/tests/baselines/reference/usingDeclarations.2(target=es2017).js
index 66c7f0b962d..a3f08d13e52 100644
--- a/tests/baselines/reference/usingDeclarations.2(target=es2017).js
+++ b/tests/baselines/reference/usingDeclarations.2(target=es2017).js
@@ -10,7 +10,7 @@
 //// [usingDeclarations.2.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarations.2(target=es2022).js b/tests/baselines/reference/usingDeclarations.2(target=es2022).js
index 66c7f0b962d..a3f08d13e52 100644
--- a/tests/baselines/reference/usingDeclarations.2(target=es2022).js
+++ b/tests/baselines/reference/usingDeclarations.2(target=es2022).js
@@ -10,7 +10,7 @@
 //// [usingDeclarations.2.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarations.2(target=es5).js b/tests/baselines/reference/usingDeclarations.2(target=es5).js
index cb89d9fb7ef..9ec10e2392d 100644
--- a/tests/baselines/reference/usingDeclarations.2(target=es5).js
+++ b/tests/baselines/reference/usingDeclarations.2(target=es5).js
@@ -10,7 +10,7 @@
 //// [usingDeclarations.2.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarations.3(target=es2015).js b/tests/baselines/reference/usingDeclarations.3(target=es2015).js
index 061c93eba32..ffe7df15b5c 100644
--- a/tests/baselines/reference/usingDeclarations.3(target=es2015).js
+++ b/tests/baselines/reference/usingDeclarations.3(target=es2015).js
@@ -12,7 +12,7 @@
 //// [usingDeclarations.3.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarations.3(target=es2017).js b/tests/baselines/reference/usingDeclarations.3(target=es2017).js
index 061c93eba32..ffe7df15b5c 100644
--- a/tests/baselines/reference/usingDeclarations.3(target=es2017).js
+++ b/tests/baselines/reference/usingDeclarations.3(target=es2017).js
@@ -12,7 +12,7 @@
 //// [usingDeclarations.3.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarations.3(target=es2022).js b/tests/baselines/reference/usingDeclarations.3(target=es2022).js
index 061c93eba32..ffe7df15b5c 100644
--- a/tests/baselines/reference/usingDeclarations.3(target=es2022).js
+++ b/tests/baselines/reference/usingDeclarations.3(target=es2022).js
@@ -12,7 +12,7 @@
 //// [usingDeclarations.3.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarations.3(target=es5).js b/tests/baselines/reference/usingDeclarations.3(target=es5).js
index baf9f209693..014e9bdf877 100644
--- a/tests/baselines/reference/usingDeclarations.3(target=es5).js
+++ b/tests/baselines/reference/usingDeclarations.3(target=es5).js
@@ -12,7 +12,7 @@
 //// [usingDeclarations.3.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarationsInFor(target=es2015).js b/tests/baselines/reference/usingDeclarationsInFor(target=es2015).js
index 7138c307899..b4b18711abf 100644
--- a/tests/baselines/reference/usingDeclarationsInFor(target=es2015).js
+++ b/tests/baselines/reference/usingDeclarationsInFor(target=es2015).js
@@ -8,7 +8,7 @@ for (using d1 = { [Symbol.dispose]() {} }, d2 = null, d3 = undefined;;) {
 //// [usingDeclarationsInFor.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarationsInFor(target=es2017).js b/tests/baselines/reference/usingDeclarationsInFor(target=es2017).js
index 7138c307899..b4b18711abf 100644
--- a/tests/baselines/reference/usingDeclarationsInFor(target=es2017).js
+++ b/tests/baselines/reference/usingDeclarationsInFor(target=es2017).js
@@ -8,7 +8,7 @@ for (using d1 = { [Symbol.dispose]() {} }, d2 = null, d3 = undefined;;) {
 //// [usingDeclarationsInFor.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarationsInFor(target=es2022).js b/tests/baselines/reference/usingDeclarationsInFor(target=es2022).js
index 7138c307899..b4b18711abf 100644
--- a/tests/baselines/reference/usingDeclarationsInFor(target=es2022).js
+++ b/tests/baselines/reference/usingDeclarationsInFor(target=es2022).js
@@ -8,7 +8,7 @@ for (using d1 = { [Symbol.dispose]() {} }, d2 = null, d3 = undefined;;) {
 //// [usingDeclarationsInFor.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarationsInFor(target=es5).js b/tests/baselines/reference/usingDeclarationsInFor(target=es5).js
index c8cff8bb8d9..1d7ba0e2092 100644
--- a/tests/baselines/reference/usingDeclarationsInFor(target=es5).js
+++ b/tests/baselines/reference/usingDeclarationsInFor(target=es5).js
@@ -8,7 +8,7 @@ for (using d1 = { [Symbol.dispose]() {} }, d2 = null, d3 = undefined;;) {
 //// [usingDeclarationsInFor.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarationsInForAwaitOf(target=es2015).js b/tests/baselines/reference/usingDeclarationsInForAwaitOf(target=es2015).js
index 24f12546aa6..68c576899e1 100644
--- a/tests/baselines/reference/usingDeclarationsInForAwaitOf(target=es2015).js
+++ b/tests/baselines/reference/usingDeclarationsInForAwaitOf(target=es2015).js
@@ -19,7 +19,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
 };
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarationsInForAwaitOf(target=es2017).js b/tests/baselines/reference/usingDeclarationsInForAwaitOf(target=es2017).js
index 988c9fbea0b..18dcd49b3b4 100644
--- a/tests/baselines/reference/usingDeclarationsInForAwaitOf(target=es2017).js
+++ b/tests/baselines/reference/usingDeclarationsInForAwaitOf(target=es2017).js
@@ -10,7 +10,7 @@ async function main() {
 //// [usingDeclarationsInForAwaitOf.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarationsInForAwaitOf(target=es2022).js b/tests/baselines/reference/usingDeclarationsInForAwaitOf(target=es2022).js
index 00737468c93..1c7b601473c 100644
--- a/tests/baselines/reference/usingDeclarationsInForAwaitOf(target=es2022).js
+++ b/tests/baselines/reference/usingDeclarationsInForAwaitOf(target=es2022).js
@@ -10,7 +10,7 @@ async function main() {
 //// [usingDeclarationsInForAwaitOf.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarationsInForAwaitOf(target=es5).js b/tests/baselines/reference/usingDeclarationsInForAwaitOf(target=es5).js
index 0ad207f7507..6e4858db55c 100644
--- a/tests/baselines/reference/usingDeclarationsInForAwaitOf(target=es5).js
+++ b/tests/baselines/reference/usingDeclarationsInForAwaitOf(target=es5).js
@@ -46,7 +46,7 @@ var __generator = (this && this.__generator) || function (thisArg, body) {
 };
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarationsInForOf.1(target=es2015).js b/tests/baselines/reference/usingDeclarationsInForOf.1(target=es2015).js
index bf993d5fb62..44639aafc8c 100644
--- a/tests/baselines/reference/usingDeclarationsInForOf.1(target=es2015).js
+++ b/tests/baselines/reference/usingDeclarationsInForOf.1(target=es2015).js
@@ -8,7 +8,7 @@ for (using d1 of [{ [Symbol.dispose]() {} }, null, undefined]) {
 //// [usingDeclarationsInForOf.1.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarationsInForOf.1(target=es2017).js b/tests/baselines/reference/usingDeclarationsInForOf.1(target=es2017).js
index bf993d5fb62..44639aafc8c 100644
--- a/tests/baselines/reference/usingDeclarationsInForOf.1(target=es2017).js
+++ b/tests/baselines/reference/usingDeclarationsInForOf.1(target=es2017).js
@@ -8,7 +8,7 @@ for (using d1 of [{ [Symbol.dispose]() {} }, null, undefined]) {
 //// [usingDeclarationsInForOf.1.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarationsInForOf.1(target=es2022).js b/tests/baselines/reference/usingDeclarationsInForOf.1(target=es2022).js
index bf993d5fb62..44639aafc8c 100644
--- a/tests/baselines/reference/usingDeclarationsInForOf.1(target=es2022).js
+++ b/tests/baselines/reference/usingDeclarationsInForOf.1(target=es2022).js
@@ -8,7 +8,7 @@ for (using d1 of [{ [Symbol.dispose]() {} }, null, undefined]) {
 //// [usingDeclarationsInForOf.1.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarationsInForOf.1(target=es5).js b/tests/baselines/reference/usingDeclarationsInForOf.1(target=es5).js
index f80303d1cfd..f7455d8f780 100644
--- a/tests/baselines/reference/usingDeclarationsInForOf.1(target=es5).js
+++ b/tests/baselines/reference/usingDeclarationsInForOf.1(target=es5).js
@@ -8,7 +8,7 @@ for (using d1 of [{ [Symbol.dispose]() {} }, null, undefined]) {
 //// [usingDeclarationsInForOf.1.js]
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
diff --git a/tests/baselines/reference/usingDeclarationsNamedEvaluationDecoratorsAndClassFields.js b/tests/baselines/reference/usingDeclarationsNamedEvaluationDecoratorsAndClassFields.js
index 7bdaa309fa6..cd38d05e5f4 100644
--- a/tests/baselines/reference/usingDeclarationsNamedEvaluationDecoratorsAndClassFields.js
+++ b/tests/baselines/reference/usingDeclarationsNamedEvaluationDecoratorsAndClassFields.js
@@ -65,7 +65,7 @@ var __setFunctionName = (this && this.__setFunctionName) || function (f, name, p
 };
 var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
     if (value !== null && value !== void 0) {
-        if (typeof value !== "object") throw new TypeError("Object expected.");
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
         var dispose;
         if (async) {
             if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");