diff --git a/core/lib/Drupal/Core/Form/FormBuilder.php b/core/lib/Drupal/Core/Form/FormBuilder.php
index 031eb69..46f1a2c 100644
--- a/core/lib/Drupal/Core/Form/FormBuilder.php
+++ b/core/lib/Drupal/Core/Form/FormBuilder.php
@@ -933,7 +933,7 @@ public function redirectForm($form_state) {
         'route_parameters' => array(),
         'options' => array(),
       );
-      $form_state['redirect_route']['absolute'] = TRUE;
+      $form_state['redirect_route']['options']['absolute'] = TRUE;
       $url = $this->urlGenerator->generateFromRoute($form_state['redirect_route']['route_name'], $form_state['redirect_route']['route_parameters'], $form_state['redirect_route']['options']);
       return new RedirectResponse($url);
     }