diff --git a/htdocs/core/class/infobox.class.php b/htdocs/core/class/infobox.class.php
index ab26ee68317..14d1bec0841 100644
--- a/htdocs/core/class/infobox.class.php
+++ b/htdocs/core/class/infobox.class.php
@@ -40,14 +40,14 @@ class InfoBox
     /**
      *  Return array of boxes qualified for area and user
      *
-     *  @param	DoliDB	$db				Database handler
-     *  @param	string	$mode			'available' or 'activated'
-     *  @param	string	$zone			Name or area (-1 for all, 0 for Homepage, 1 for xxx, ...)
-     *  @param  User    $user	  		Object user to filter
-     *  @param	array	$excludelist	Array of box id (box.box_id = boxes_def.rowid) to exclude
-     *  @return array               	Array of boxes
+     *  @param	DoliDB		$db				Database handler
+     *  @param	string		$mode			'available' or 'activated'
+     *  @param	string		$zone			Name or area (-1 for all, 0 for Homepage, 1 for xxx, ...)
+     *  @param  User|null   $user	  		Object user to filter
+     *  @param	array		$excludelist	Array of box id (box.box_id = boxes_def.rowid) to exclude
+     *  @return array       	        	Array of boxes
      */
-    static function listBoxes($db, $mode, $zone, $user, $excludelist=array())
+    static function listBoxes($db, $mode, $zone, $user=null, $excludelist=array())
     {
         global $conf;