diff --git a/src/lib/es5.d.ts b/src/lib/es5.d.ts
index 7ee47817802..63b60f534af 100644
--- a/src/lib/es5.d.ts
+++ b/src/lib/es5.d.ts
@@ -176,6 +176,18 @@ interface ObjectConstructor {
       */
     seal<T>(o: T): T;
 
+    /**
+      * Prevents the modification of existing property attributes and values, and prevents the addition of new properties.
+      * @param o Object on which to lock the attributes.
+      */
+    freeze<T>(a: T[]): ReadonlyArray<T>;
+
+    /**
+      * Prevents the modification of existing property attributes and values, and prevents the addition of new properties.
+      * @param o Object on which to lock the attributes.
+      */
+    freeze<T, U>(f: (...args: T[]) => U): (...args: T[]) => U;
+
     /**
       * Prevents the modification of existing property attributes and values, and prevents the addition of new properties.
       * @param o Object on which to lock the attributes.
diff --git a/tests/baselines/reference/objectFreeze.errors.txt b/tests/baselines/reference/objectFreeze.errors.txt
new file mode 100644
index 00000000000..e820520ed8a
--- /dev/null
+++ b/tests/baselines/reference/objectFreeze.errors.txt
@@ -0,0 +1,15 @@
+tests/cases/compiler/objectFreeze.ts(5,24): error TS2345: Argument of type '123' is not assignable to parameter of type 'string'.
+tests/cases/compiler/objectFreeze.ts(6,2): error TS1128: Declaration or statement expected.
+
+
+==== tests/cases/compiler/objectFreeze.ts (2 errors) ====
+    class A {
+        constructor(public a1: string) {
+        }
+    }
+    function foo(x = new A(123)) { //should error, 123 is not string
+                           ~~~
+!!! error TS2345: Argument of type '123' is not assignable to parameter of type 'string'.
+    }}
+     ~
+!!! error TS1128: Declaration or statement expected.
\ No newline at end of file
diff --git a/tests/baselines/reference/objectFreeze.js b/tests/baselines/reference/objectFreeze.js
new file mode 100644
index 00000000000..86c2833dabf
--- /dev/null
+++ b/tests/baselines/reference/objectFreeze.js
@@ -0,0 +1,18 @@
+//// [objectFreeze.ts]
+class A {
+    constructor(public a1: string) {
+    }
+}
+function foo(x = new A(123)) { //should error, 123 is not string
+}}
+
+//// [objectFreeze.js]
+var A = (function () {
+    function A(a1) {
+        this.a1 = a1;
+    }
+    return A;
+}());
+function foo(x) {
+    if (x === void 0) { x = new A(123); }
+}
diff --git a/tests/cases/compiler/objectFreeze.ts b/tests/cases/compiler/objectFreeze.ts
new file mode 100644
index 00000000000..e92f9ecd00e
--- /dev/null
+++ b/tests/cases/compiler/objectFreeze.ts
@@ -0,0 +1,6 @@
+class A {
+    constructor(public a1: string) {
+    }
+}
+function foo(x = new A(123)) { //should error, 123 is not string
+}}
\ No newline at end of file