diff --git a/angularjs/angular-tests.ts b/angularjs/angular-tests.ts
index 10d806217..a9f77b97e 100644
--- a/angularjs/angular-tests.ts
+++ b/angularjs/angular-tests.ts
@@ -381,6 +381,45 @@ var scope: ng.IScope = element.scope();
 var isolateScope: ng.IScope = element.isolateScope();
 
 
+// $timeout signature tests
+module TestTimeout {
+    interface TResult {
+        a: number;
+        b: string;
+        c: boolean;
+    }
+    var fnTResult: (...args: any[]) => TResult;
+    var promiseAny: angular.IPromise<any>;
+    var $timeout: angular.ITimeoutService;
+
+    // $timeout
+    {
+        let result: angular.IPromise<any>;
+        result = $timeout();
+    }
+    {
+        let result: angular.IPromise<void>;
+        result = $timeout(1);
+        result = $timeout(1, true);
+    }
+    {
+        let result: angular.IPromise<TResult>;
+        result = $timeout(fnTResult);
+        result = $timeout(fnTResult, 1);
+        result = $timeout(fnTResult, 1, true);
+        result = $timeout(fnTResult, 1, true, 1);
+        result = $timeout(fnTResult, 1, true, 1, '');
+        result = $timeout(fnTResult, 1, true, 1, '', true);
+    }
+
+    // $timeout.cancel
+    {
+        let result: boolean;
+        result = $timeout.cancel();
+        result = $timeout.cancel(promiseAny);
+    }
+}
+
 
 function test_IAttributes(attributes: ng.IAttributes){
     return attributes;
diff --git a/angularjs/angular.d.ts b/angularjs/angular.d.ts
index 17c0c9384..0dc9ca2ca 100644
--- a/angularjs/angular.d.ts
+++ b/angularjs/angular.d.ts
@@ -725,8 +725,9 @@ declare module angular {
     // see http://docs.angularjs.org/api/ng.$timeout
     ///////////////////////////////////////////////////////////////////////////
     interface ITimeoutService {
-        <T>(func: (...args: any[]) => T, delay?: number, invokeApply?: boolean): IPromise<T>;
-        cancel(promise: IPromise<any>): boolean;
+        (delay?: number, invokeApply?: boolean): IPromise<void>;
+        <T>(fn: (...args: any[]) => T, delay?: number, invokeApply?: boolean, ...args: any[]): IPromise<T>;
+        cancel(promise?: IPromise<any>): boolean;
     }
 
     ///////////////////////////////////////////////////////////////////////////