diff --git a/modules/monitoring/library/Monitoring/Backend/Ido/Query/IdoQuery.php b/modules/monitoring/library/Monitoring/Backend/Ido/Query/IdoQuery.php
index 1ce089be5..c5e9e5333 100644
--- a/modules/monitoring/library/Monitoring/Backend/Ido/Query/IdoQuery.php
+++ b/modules/monitoring/library/Monitoring/Backend/Ido/Query/IdoQuery.php
@@ -481,7 +481,7 @@ abstract class IdoQuery extends DbQuery
     public function addFilter(Filter $filter)
     {
         $this->requireFilterColumns($filter);
-        parent::addFilter($filter);
+        return parent::addFilter($filter);
     }
 
     /**