diff --git a/plugins/SubMirror/lib/mirrorqueuehandler.php b/plugins/SubMirror/lib/mirrorqueuehandler.php
index 0306180eeb..92b36b5ebf 100644
--- a/plugins/SubMirror/lib/mirrorqueuehandler.php
+++ b/plugins/SubMirror/lib/mirrorqueuehandler.php
@@ -40,5 +40,6 @@ class MirrorQueueHandler extends QueueHandler
                 $mirror->mirrorNotice($notice);
             }
         }
+        return true;
     }
 }