diff --git a/app/controllers/maintenance/user/dmail_filters_controller.rb b/app/controllers/maintenance/user/dmail_filters_controller.rb
index 395b56f81..69eb58153 100644
--- a/app/controllers/maintenance/user/dmail_filters_controller.rb
+++ b/app/controllers/maintenance/user/dmail_filters_controller.rb
@@ -21,7 +21,7 @@ module Maintenance
         @dmail = Dmail.find(params[:dmail_id])
 
         if @dmail.owner_id != CurrentUser.user.id
-          raise User::PrivilegeError.new
+          raise ::User::PrivilegeError.new
         end
       end