diff --git a/airtime_mvc/application/upgrade/Upgrades.php b/airtime_mvc/application/upgrade/Upgrades.php
index 31c602437..4535fe475 100644
--- a/airtime_mvc/application/upgrade/Upgrades.php
+++ b/airtime_mvc/application/upgrade/Upgrades.php
@@ -381,4 +381,7 @@ class AirtimeUpgrader2511 extends AirtimeUpgrader
             throw $e;
         }
     }
+    public function downgrade() {
+
+    }
 }