diff --git a/library/Businessprocess/Controller.php b/library/Businessprocess/Controller.php
index a1101bc..8110f14 100644
--- a/library/Businessprocess/Controller.php
+++ b/library/Businessprocess/Controller.php
@@ -10,6 +10,7 @@ use Icinga\Module\Businessprocess\Form\ProcessForm;
 use Icinga\Module\Businessprocess\Form\SimulationForm;
 use Icinga\Web\Url;
 use Icinga\Web\Widget;
+use Exception;
 
 class Controller extends ModuleActionController
 {