Index: zabbix/maintenance.php
==================================================
--- zabbix/maintenance.php	2018-01-15 10:11:22.164644066 -0500
+++ zabbix/maintenance.php	2018-01-15 10:11:49.813128362 -0500
@@ -531,6 +531,7 @@
 		'output' => array('maintenanceid', $sortField),
 		'editable' => true,
 		'sortfield' => $sortField,
+		'sortorder' => $sortOrder,
 		'limit' => $config['search_limit'] + 1
 	);