diff --git a/angularjs/angular.d.ts b/angularjs/angular.d.ts
index f396593ef5..137f72fe15 100755
--- a/angularjs/angular.d.ts
+++ b/angularjs/angular.d.ts
@@ -94,7 +94,7 @@ declare module ng {
         controller(name: string, controllerConstructor: Function): IModule;
         controller(name: string, inlineAnnotadedConstructor: any[]): IModule;
         controller(object : Object): IModule;
-        directive(name: string, directiveFactory: (...params:any[])=> IDirective): IModule;
+        directive(name: string, directiveFactory: Function): IModule;
         directive(name: string, inlineAnnotadedFunction: any[]): IModule;
         directive(object: Object): IModule;
         factory(name: string, serviceFactoryFunction: Function): IModule;
diff --git a/mocha/mocha.d.ts b/mocha/mocha.d.ts
index cd4a06e464..5ea4237fc6 100644
--- a/mocha/mocha.d.ts
+++ b/mocha/mocha.d.ts
@@ -8,7 +8,7 @@ interface Mocha {
     setup(options: MochaSetupOptions): Mocha;
 
     //Run tests and invoke `fn()` when complete.
-    run(callback: () => void): void;
+    run(callback?: () => void): void;
 
     // Set reporter as function
     reporter(reporter: () => void): Mocha;