diff --git a/core/Common.php b/core/Common.php
index 44d9e2cfdfd..95bc22d5d62 100644
--- a/core/Common.php
+++ b/core/Common.php
@@ -1137,6 +1137,7 @@ public static function sendResponseCode($code)
             401 => 'Unauthorized',
             403 => 'Forbidden',
             404 => 'Not Found',
+            429 => 'Too Many Requests',
             500 => 'Internal Server Error',
             503 => 'Service Unavailable',
         );