diff --git a/library/Director/Objects/IcingaNotification.php b/library/Director/Objects/IcingaNotification.php
index cdd834bd..35fe9778 100644
--- a/library/Director/Objects/IcingaNotification.php
+++ b/library/Director/Objects/IcingaNotification.php
@@ -2,6 +2,7 @@
 
 namespace Icinga\Module\Director\Objects;
 
+use Icinga\Exception\ConfigurationError;
 use Icinga\Module\Director\IcingaConfig\IcingaConfigHelper as c;
 
 class IcingaNotification extends IcingaObject