diff --git a/src/ngMessages/messages.js b/src/ngMessages/messages.js
index 66ce4e4e4b48..a43e562796d8 100644
--- a/src/ngMessages/messages.js
+++ b/src/ngMessages/messages.js
@@ -380,7 +380,7 @@ angular.module('ngMessages', [])
               });
             }
           },
-          detach: function(now) {
+          detach: function() {
             if (element) {
               $animate.leave(element);
               element = null;