diff --git a/lib/icinga/downtimeprocessor.cpp b/lib/icinga/downtimeprocessor.cpp
index ab9580f46..9e276e1f9 100644
--- a/lib/icinga/downtimeprocessor.cpp
+++ b/lib/icinga/downtimeprocessor.cpp
@@ -56,6 +56,8 @@ int DowntimeProcessor::AddDowntime(const DynamicObject::Ptr& owner,
 
 	downtimes->Set(Convert::ToString(id), downtime);
 	owner->Set("downtimes", downtimes);
+
+	return id;
 }
 
 void DowntimeProcessor::RemoveDowntime(int id)