diff --git a/angularjs/angular.d.ts b/angularjs/angular.d.ts
index 140e56eee9..bf53673001 100755
--- a/angularjs/angular.d.ts
+++ b/angularjs/angular.d.ts
@@ -138,6 +138,7 @@ declare module ng {
         $valid: boolean;
         $invalid: boolean;
         $error: any;
+        $setDirty(dirty: boolean): void;
     }
 
     ///////////////////////////////////////////////////////////////////////////