diff --git a/lib/scripts/editor.js b/lib/scripts/editor.js
index f36d446d56c8bf1c176e61286bf96b2b19723413..042e3460852c2a8dc6986389d89659cac0c46669 100644
--- a/lib/scripts/editor.js
+++ b/lib/scripts/editor.js
@@ -130,7 +130,7 @@ var dw_editor = {
      * @param event e - the key press event object
      */
     keyHandler: function(e){
-        if([8, 13, 32].indexOf(e.keyCode) === -1) {
+        if(jQuery.inArray(e.keyCode,[8, 13, 32]) === -1) {
             return;
         }
         var selection = getSelection(this);