diff --git a/config/filter.php b/config/filter.php
index 6b26ad992d..4318295e48 100644
--- a/config/filter.php
+++ b/config/filter.php
@@ -26,6 +26,7 @@ $filter->default->cookie['lang']        = 'reg::lang';
 $filter->default->cookie['theme']       = 'reg::word';
 $filter->default->cookie['fingerprint'] = 'reg::word';
 $filter->default->cookie['hideMenu']    = 'equal::true';
+$filter->default->cookie['openApp']     = 'reg::word';
 
 $filter->bug        = new stdclass();
 $filter->caselib    = new stdclass();