diff --git a/mindplot/src/main/javascript/PersistenceManager.js b/mindplot/src/main/javascript/PersistenceManager.js
index 387a179d..37958100 100644
--- a/mindplot/src/main/javascript/PersistenceManager.js
+++ b/mindplot/src/main/javascript/PersistenceManager.js
@@ -42,7 +42,7 @@ mindplot.PersistenceManager = new Class({
         var domMap = serializer.toXML(mindmap);
         var mapXml = core.Utils.innerXML(domMap);
 
-        var pref = JSON.encode(editorProperties);
+        var pref = (editorProperties);
         try {
             this.saveMapXml(mapId, mapXml, pref, saveHistory, events, sync);
         } catch (e) {