diff --git a/angularjs/angular-tests.ts b/angularjs/angular-tests.ts
index ad1eef90cd..e4f6d35ba7 100644
--- a/angularjs/angular-tests.ts
+++ b/angularjs/angular-tests.ts
@@ -250,6 +250,12 @@ httpFoo.then((x) => {
     x.toFixed();
 });
 
+httpFoo.success((data, status, headers, config) => {
+    var h = headers("test");
+    h.charAt(0);
+    var hs = headers();
+    hs.concat(["test"]);
+});
 
 function test_angular_forEach() {
     var values: { [key: string]: string } = { name: 'misko', gender: 'male' };
diff --git a/angularjs/angular.d.ts b/angularjs/angular.d.ts
index 199a67557f..47f1e83d16 100755
--- a/angularjs/angular.d.ts
+++ b/angularjs/angular.d.ts
@@ -1200,8 +1200,13 @@ declare module ng {
         url: string;
     }
 
+    interface IHttpHeadersGetter {
+        (): { [name: string]: string; };
+        (headerName: string): string;
+    }
+
     interface IHttpPromiseCallback<T> {
-        (data: T, status: number, headers: (headerName?: string) => string, config: IRequestConfig): void;
+        (data: T, status: number, headers: IHttpHeadersGetter, config: IRequestConfig): void;
     }
 
     interface IHttpPromiseCallbackArg<T> {