diff --git a/lib/galaxy/actions/admin.py b/lib/galaxy/actions/admin.py
index cdd8b0cd24c..9a50f0868d1 100644
--- a/lib/galaxy/actions/admin.py
+++ b/lib/galaxy/actions/admin.py
@@ -150,7 +150,7 @@ class AdminActions( object ):
         message += ', '.join( names )
         return message
 
-    def _undelete_quota( self, quota, params ):
+    def _undelete_quota( self, quota, params = None):
         quotas = util.listify( quota )
         names = []
         for q in quotas: