diff --git a/modules/monitoring/library/Monitoring/Controller.php b/modules/monitoring/library/Monitoring/Controller.php
index 4f0c83478..42501eb7b 100644
--- a/modules/monitoring/library/Monitoring/Controller.php
+++ b/modules/monitoring/library/Monitoring/Controller.php
@@ -32,6 +32,7 @@ namespace Icinga\Module\Monitoring;
 use Icinga\Application\Config as IcingaConfig;
 use Icinga\Module\Monitoring\DataView\ServiceStatus as ServiceStatusView;
 use Icinga\Web\Controller\ActionController;
+use Icinga\File\Csv;
 
 /**
  * Base class for all monitoring action controller