diff --git a/code/model/UserDefinedForm.php b/code/model/UserDefinedForm.php
index 65d9c8f..2ffb788 100755
--- a/code/model/UserDefinedForm.php
+++ b/code/model/UserDefinedForm.php
@@ -706,7 +706,7 @@ JS
      * @param ArrayList fields
      * @return ArrayData
      */
-    private function getMergeFieldsMap($fields = array())
+    protected function getMergeFieldsMap($fields = array())
     {
         $data = new ArrayData(array());