diff --git a/modules/angular2/src/core/platform_bindings.ts b/modules/angular2/src/core/platform_bindings.ts
index 059df5a2bb..c676166356 100644
--- a/modules/angular2/src/core/platform_bindings.ts
+++ b/modules/angular2/src/core/platform_bindings.ts
@@ -1,8 +1,9 @@
 import {provide} from 'angular2/src/core/di';
+import {Provider} from "angular2/src/core/di/provider";
 import {ExceptionHandler} from 'angular2/src/facade/exceptions';
 import {DOM} from 'angular2/src/core/dom/dom_adapter';
 
-export const EXCEPTION_PROVIDER =
+export const EXCEPTION_PROVIDER: Provider =
     provide(ExceptionHandler, {useFactory: () => new ExceptionHandler(DOM, false), deps: []});
 
-export const EXCEPTION_BINDING = EXCEPTION_PROVIDER;
\ No newline at end of file
+export const EXCEPTION_BINDING = EXCEPTION_PROVIDER;
diff --git a/modules/angular2/src/mock/animation_builder_mock.ts b/modules/angular2/src/mock/animation_builder_mock.ts
index 8aa7758cd8..82813fb867 100644
--- a/modules/angular2/src/mock/animation_builder_mock.ts
+++ b/modules/angular2/src/mock/animation_builder_mock.ts
@@ -8,7 +8,7 @@ import {BrowserDetails} from 'angular2/src/animate/browser_details';
 @Injectable()
 export class MockAnimationBuilder extends AnimationBuilder {
   constructor() { super(null); }
-  css(): MockCssAnimationBuilder { return new MockCssAnimationBuilder(); }
+  css(): CssAnimationBuilder { return new MockCssAnimationBuilder(); }
 }
 
 class MockCssAnimationBuilder extends CssAnimationBuilder {