diff --git a/node_delete_redirect.module b/node_delete_redirect.module
index 6a5704e..ec852eb 100644
--- a/node_delete_redirect.module
+++ b/node_delete_redirect.module
@@ -31,9 +31,11 @@ function node_delete_redirect_help($route_name, RouteMatchInterface $route_match
  * {@inheritdoc}
  */
 function node_delete_redirect_form_alter(&$form, FormStateInterface $form_state, $form_id) {
-  $config = \Drupal::configFactory()
+  if (!$config = \Drupal::configFactory()
     ->getEditable('node_delete_redirect.admin_settings_form')
-    ->get('ndr_admin_form_settings');
+    ->get('ndr_admin_form_settings')) {
+    return;
+  }
 
   if ($config['ndr_check']) {
     foreach ($config['ndr_settings'] as $type => $values) {