diff --git a/phpgwapi/inc/class.acl.inc.php b/phpgwapi/inc/class.acl.inc.php
index c53d49542c..0ca74f0fc3 100644
--- a/phpgwapi/inc/class.acl.inc.php
+++ b/phpgwapi/inc/class.acl.inc.php
@@ -313,10 +313,10 @@ class acl
 	 *
 	 * @param string $location app location
 	 * @param string $appname='' optional defaults to currentapp
-	 * @param int $account_id=0 optional defaults to $this->account_id
+	 * @param array $memberships=array() additional account_id, eg. memberships to match beside $this->account_id, default none
 	 * @return int $rights
 	 */
-	function get_specific_rights($location, $appname = '')
+	function get_specific_rights($location, $appname = '', $memberships=array())
 	{
 		if (!$appname) $appname = $GLOBALS['egw_info']['flags']['currentapp'];
 
@@ -330,7 +330,7 @@ class acl
 		{
 			if ($value['appname'] == $appname &&
 				($value['location'] == $location ||	$value['location'] == 'everywhere') &&
-				$value['account'] == $this->account_id)
+				($value['account'] == $this->account_id || $memberships && in_array($value['account'], $memberships)))
 			{
 				if ($value['rights'] == 0)
 				{
diff --git a/preferences/inc/class.uiaclprefs.inc.php b/preferences/inc/class.uiaclprefs.inc.php
index 7102b3dbdb..5b6b71a9a3 100644
--- a/preferences/inc/class.uiaclprefs.inc.php
+++ b/preferences/inc/class.uiaclprefs.inc.php
@@ -345,7 +345,7 @@ class uiaclprefs
 		//echo "<p>display_row(,$label,$id,$name,$no_privat_grants,".print_r($memberships,true).")</p>\n";
 		$this->template->set_var('row_class',$tr_class);
 		$this->template->set_var('user',$name);
-		$rights = $this->acl->get_rights($id,$GLOBALS['egw_info']['flags']['currentapp']);
+		$rights = $this->acl->get_specific_rights($id, $GLOBALS['egw_info']['flags']['currentapp'], $memberships);
 
 		foreach(array(
 			EGW_ACL_READ		=> 'read',