diff --git a/actions/conversation.php b/actions/conversation.php
index c8755ba6ef..6b5d8d54d9 100644
--- a/actions/conversation.php
+++ b/actions/conversation.php
@@ -167,6 +167,8 @@ class ConversationTree extends NoticeList
 
     function _buildTree()
     {
+        $cnt = 0;
+
         $this->tree  = array();
         $this->table = array();