diff --git a/modules/monitoring/application/forms/Command/Object/ScheduleHostDowntimeCommandForm.php b/modules/monitoring/application/forms/Command/Object/ScheduleHostDowntimeCommandForm.php
index 046b6fee0..003f3f0aa 100644
--- a/modules/monitoring/application/forms/Command/Object/ScheduleHostDowntimeCommandForm.php
+++ b/modules/monitoring/application/forms/Command/Object/ScheduleHostDowntimeCommandForm.php
@@ -3,6 +3,7 @@
 
 namespace Icinga\Module\Monitoring\Forms\Command\Object;
 
+use DateTime;
 use Icinga\Module\Monitoring\Command\Object\PropagateHostDowntimeCommand;
 use Icinga\Module\Monitoring\Command\Object\ScheduleHostDowntimeCommand;
 use Icinga\Module\Monitoring\Command\Object\ScheduleServiceDowntimeCommand;