diff --git a/calendar/inc/class.calendar_bo.inc.php b/calendar/inc/class.calendar_bo.inc.php
index 144c9a78de..33425e4c5c 100644
--- a/calendar/inc/class.calendar_bo.inc.php
+++ b/calendar/inc/class.calendar_bo.inc.php
@@ -344,7 +344,7 @@ class calendar_bo
 			// for groups we have to include the members
 			if ($GLOBALS['egw']->accounts->get_type($user) == 'g')
 			{
-				if ($params['filter'] == 'no-enum-groups') continue;
+				if ($no_enum_groups) continue;
 
 				$members = $GLOBALS['egw']->accounts->member($user);
 				if (is_array($members))