diff --git a/src/case/tree/tree.level.js b/src/case/tree/tree.level.js
index 0c30351f4..b83890501 100644
--- a/src/case/tree/tree.level.js
+++ b/src/case/tree/tree.level.js
@@ -107,7 +107,7 @@ BI.LevelTree = BI.inherit(BI.Widget, {
 
     populate: function (items) {
         items = this._formatItems(BI.Tree.transformToTreeFormat(items), 0);
-        this.tree.populate(items);
+        this.tree.populate(items, Array.prototype.slice.call(arguments, 0));
     },
 
     setValue: function (v) {