diff --git a/lib/zone.ts b/lib/zone.ts
index 992410575..d144588ad 100644
--- a/lib/zone.ts
+++ b/lib/zone.ts
@@ -1151,6 +1151,10 @@ const Zone: ZoneType = (function(global: any) {
   }
 
   class ZoneAwarePromise<R> implements Promise<R> {
+    static toString() {
+      return 'function ZoneAwarePromise() { [native code] }';
+    }
+
     static resolve<R>(value: R): Promise<R> {
       return resolvePromise(<ZoneAwarePromise<R>>new this(null), RESOLVED, value);
     }
diff --git a/test/common/Promise.spec.ts b/test/common/Promise.spec.ts
index 2137235b4..423310849 100644
--- a/test/common/Promise.spec.ts
+++ b/test/common/Promise.spec.ts
@@ -55,6 +55,10 @@ describe(
         log = [];
       });
 
+      it('should pretend to be a native code', () => {
+        expect(String(Promise).indexOf('[native code]') >= 0).toBe(true);
+      });
+
       it('should make sure that new Promise is instance of Promise', () => {
         expect(Promise.resolve(123) instanceof Promise).toBe(true);
         expect(new Promise(() => null) instanceof Promise).toBe(true);