diff --git a/controllers/ConfigController.php b/controllers/ConfigController.php
index 339db217..1914033e 100644
--- a/controllers/ConfigController.php
+++ b/controllers/ConfigController.php
@@ -162,7 +162,7 @@ class ConfigController extends Controller {
         }
         return $this->render('index', [
                     "servermqtt" => $servermqtt,
-                    "url" => $temp[2]
+                    "url" => isset($temp[2]) ? $temp[2] : ""
         ]);
     }