diff --git a/lib/ace/ace.js b/lib/ace/ace.js
index bb365ed1..34859be4 100644
--- a/lib/ace/ace.js
+++ b/lib/ace/ace.js
@@ -108,7 +108,7 @@ exports.edit = function(el) {
  * 
  **/
 exports.createEditSession = function(text, mode) {
-    var doc = new EditSession(text, doc);
+    var doc = new EditSession(text, mode);
     doc.setUndoManager(new UndoManager());
     return doc;
 }