diff --git a/angularjs/angular.d.ts b/angularjs/angular.d.ts
index 86f0859b88..ff95dc327f 100644
--- a/angularjs/angular.d.ts
+++ b/angularjs/angular.d.ts
@@ -406,6 +406,7 @@ declare module ng {
     }
 
     interface IPromise<T> {
+    	then<TResult>(successCallback: (promiseValue: T) => IHttpPromise<TResult>, errorCallback?: (reason: any) => any): IHttpPromise<TResult>;
         then<TResult>(successCallback: (promiseValue: T) => IPromise<TResult>, errorCallback?: (reason: any) => any): IPromise<TResult>;
         then<TResult>(successCallback: (promiseValue: T) => TResult, errorCallback?: (reason: any) => TResult): IPromise<TResult>;
     }