diff --git a/calendar/inc/class.calendar_category_report.inc.php b/calendar/inc/class.calendar_category_report.inc.php
index 5998291ed2..fe2dcd6f3b 100644
--- a/calendar/inc/class.calendar_category_report.inc.php
+++ b/calendar/inc/class.calendar_category_report.inc.php
@@ -257,7 +257,7 @@ class calendar_category_report extends calendar_ui{
 		{
 			$button = @key($content['button']);
 			$result = $categories = $content_rows = array ();
-			$users = array_keys($GLOBALS['egw']->accounts->search(array('type'=>'accounts', active=>true)));
+			$users = array_keys($GLOBALS['egw']->accounts->search(array('type'=>'accounts', 'active'=>true)));
 
 			// report button pressed
 			if (!empty($button))