diff --git a/client.js b/client.js
index 1b39de2d..f0650b83 100644
--- a/client.js
+++ b/client.js
@@ -137,7 +137,7 @@ CloudClient.Utils        = (function(){
     this.ajax = function(pParams){
         /* if on webkit
          */
-        if(document.XMLHttpRequest){
+        if(window.XMLHttpRequest){
             if(!lXMLHTTP)
                 lXMLHTTP = new XMLHttpRequest();