diff --git a/main/admin/settings.php b/main/admin/settings.php
index 17dc53775a..33f400a268 100644
--- a/main/admin/settings.php
+++ b/main/admin/settings.php
@@ -419,7 +419,8 @@ if (!empty($_GET['category'])) {
             }            
             break;
         default:
-            $form->display();
+            if (isset($form))
+                $form->display();
     }
 }