diff --git a/modules/angular2/src/mock/location_mock.ts b/modules/angular2/src/mock/location_mock.ts
index 00f8bee13d..2f25fc7ed0 100644
--- a/modules/angular2/src/mock/location_mock.ts
+++ b/modules/angular2/src/mock/location_mock.ts
@@ -44,8 +44,8 @@ export class SpyLocation implements Location {
   }
 
   subscribe(onNext: (value: any) => void, onThrow: (error: any) => void = null,
-            onReturn: () => void = null) {
-    ObservableWrapper.subscribe(this._subject, onNext, onThrow, onReturn);
+            onReturn: () => void = null): Object {
+    return ObservableWrapper.subscribe(this._subject, onNext, onThrow, onReturn);
   }
 
   // TODO: remove these once Location is an interface, and can be implemented cleanly
diff --git a/modules/angular2/src/router/location.ts b/modules/angular2/src/router/location.ts
index 254541bade..6a6552b023 100644
--- a/modules/angular2/src/router/location.ts
+++ b/modules/angular2/src/router/location.ts
@@ -144,8 +144,8 @@ export class Location {
    * Subscribe to the platform's `popState` events.
    */
   subscribe(onNext: (value: any) => void, onThrow: (exception: any) => void = null,
-            onReturn: () => void = null): void {
-    ObservableWrapper.subscribe(this._subject, onNext, onThrow, onReturn);
+            onReturn: () => void = null): Object {
+    return ObservableWrapper.subscribe(this._subject, onNext, onThrow, onReturn);
   }
 }