diff --git a/phpgwapi/inc/class.egw_framework.inc.php b/phpgwapi/inc/class.egw_framework.inc.php
index 1ceac0acb4..6366bc0db5 100644
--- a/phpgwapi/inc/class.egw_framework.inc.php
+++ b/phpgwapi/inc/class.egw_framework.inc.php
@@ -863,7 +863,7 @@ abstract class egw_framework
 	*/
 	abstract function _add_topmenu_info_item($content);
 
-	static $top_menu_extra;
+	static $top_menu_extra = array();
 
 	/**
 	* Called by hooks to add an entry in the topmenu location.