diff --git a/lib/client.js b/lib/client.js
index ed3104e6..da147b9f 100644
--- a/lib/client.js
+++ b/lib/client.js
@@ -146,7 +146,7 @@ var Util, DOM, CloudFunc;
                     ]);
                 },
                 
-                func = function(callBack) {
+                func = function(callback) {
                     var src = CloudCmd.LIBDIRCLIENT + 'polyfill.js';
                     
                     CloudCmd.OLD_BROWSER = true;