diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index 6a338a0f9d2..f4c505b9450 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -426,7 +426,7 @@ namespace ts {
 
     /** Given a symbol for a module, checks that it is either an untyped import or a shorthand ambient module. */
     export function isUntypedOrShorthandAmbientModuleSymbol(moduleSymbol: Symbol): boolean {
-        return !moduleSymbol.valueDeclaration || isShorthandAmbientModule(moduleSymbol.valueDeclaration);
+        return !moduleSymbol.declarations || isShorthandAmbientModule(moduleSymbol.valueDeclaration);
     }
 
     function isShorthandAmbientModule(node: Node): boolean {
diff --git a/tests/baselines/reference/extendsUntypedModule.js b/tests/baselines/reference/extendsUntypedModule.js
index ad35e4abaac..f86ded7e6cb 100644
--- a/tests/baselines/reference/extendsUntypedModule.js
+++ b/tests/baselines/reference/extendsUntypedModule.js
@@ -22,6 +22,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
+exports.__esModule = true;
 var foo_1 = require("foo");
 var A = (function (_super) {
     __extends(A, _super);