diff --git a/angularjs/angular.d.ts b/angularjs/angular.d.ts
index 191aa7692e..31f59d9fa6 100755
--- a/angularjs/angular.d.ts
+++ b/angularjs/angular.d.ts
@@ -665,6 +665,7 @@ declare module angular {
     // TODO undocumented, so we need to get it from the source code
     ///////////////////////////////////////////////////////////////////////////
     interface IBrowserService {
+        defer: ng.ITimeoutService;
         [key: string]: any;
     }