diff --git a/html5/verto/verto_communicator/src/vertoService/services/vertoService.js b/html5/verto/verto_communicator/src/vertoService/services/vertoService.js
index 229bc8b7fc..e65d2f68f4 100644
--- a/html5/verto/verto_communicator/src/vertoService/services/vertoService.js
+++ b/html5/verto/verto_communicator/src/vertoService/services/vertoService.js
@@ -279,7 +279,7 @@ vertoService.service('verto', ['$rootScope', '$cookieStore', '$location', 'stora
           data.canVideo = true;
         }
 
-        if(callback) {
+        if(angular.isFunction(callback)) {
           callback();
         }
       },