diff --git a/angularjs/angular.d.ts b/angularjs/angular.d.ts
index d9c948a156..989c6d48d2 100644
--- a/angularjs/angular.d.ts
+++ b/angularjs/angular.d.ts
@@ -305,6 +305,7 @@ declare module ng {
     // see http://docs.angularjs.org/api/ng.$log
     ///////////////////////////////////////////////////////////////////////////
     interface ILogService {
+        debug: ILogCall;
         error: ILogCall;
         info: ILogCall;
         log: ILogCall;