diff --git a/types/async/index.d.ts b/types/async/index.d.ts
index 33bb1a6c0e..9b19f47249 100644
--- a/types/async/index.d.ts
+++ b/types/async/index.d.ts
@@ -28,7 +28,7 @@ interface AsyncQueue<T> {
     idle(): boolean;
     concurrency: number;
     push<E>(task: T, callback?: ErrorCallback<E>): void;
-    push<E>(task: T, callback?: AsyncResultCallback<T, E>): void;
+    push<R,E>(task: T, callback?: AsyncResultCallback<R, E>): void;
     push<E>(task: T[], callback?: ErrorCallback<E>): void;
     unshift<E>(task: T, callback?: ErrorCallback<E>): void;
     unshift<E>(task: T[], callback?: ErrorCallback<E>): void;
@@ -53,8 +53,8 @@ interface AsyncPriorityQueue<T> {
     concurrency: number;
     started: boolean;
     paused: boolean;
-    push<E>(task: T, priority: number, callback?: AsyncResultArrayCallback<T, E>): void;
-    push<E>(task: T[], priority: number, callback?: AsyncResultArrayCallback<T, E>): void;
+    push<R,E>(task: T, priority: number, callback?: AsyncResultArrayCallback<R, E>): void;
+    push<R,E>(task: T[], priority: number, callback?: AsyncResultArrayCallback<R, E>): void;
     saturated: () => any;
     empty: () => any;
     drain: () => any;
diff --git a/types/async/test/index.ts b/types/async/test/index.ts
index b30ca4c7ba..60234a0ca4 100644
--- a/types/async/test/index.ts
+++ b/types/async/test/index.ts
@@ -271,9 +271,9 @@ async.waterfall([
 ], function (err, result) { });
 
 
-var q = async.queue<any,Error>(function (task: any, callback: () => void) {
+var q = async.queue<any,Error>(function (task: any, callback: (err?:Error,msg?:string) => void) {
     console.log('hello ' + task.name);
-    callback();
+    callback(undefined,'a message.');
 }, 2);
 
 
@@ -291,6 +291,10 @@ q.push([{ name: 'baz' }, { name: 'bay' }, { name: 'bax' }], function (err) {
     console.log('finished processing bar');
 });
 
+q.push<string,Error>({name: 'foo'}, function (err,msg) {
+  console.log('foo finished with a message "'+ msg! + '"');
+});
+
 q.unshift({ name: 'foo' });
 
 q.unshift({ name: 'bar' }, function (err) {