diff --git a/src/Form/OptionsQuery.php b/src/Form/OptionsQuery.php
index bda3dac298..74d196e22a 100644
--- a/src/Form/OptionsQuery.php
+++ b/src/Form/OptionsQuery.php
@@ -117,7 +117,7 @@ protected function template(string $object, string $field, array $data)
                 'user'          => '{{ user.username }}',
             ];
 
-            if ($value === $defaults[$object]) {
+            if (isset($defaults[$object]) && $value === $defaults[$object]) {
                 $result = Escape::html($result);
             }
         }