diff --git a/core/lib/Drupal/Core/Form/FormBuilder.php b/core/lib/Drupal/Core/Form/FormBuilder.php
index bbbf4ff..4643d12 100644
--- a/core/lib/Drupal/Core/Form/FormBuilder.php
+++ b/core/lib/Drupal/Core/Form/FormBuilder.php
@@ -398,7 +398,7 @@ public function retrieveForm($form_id, FormStateInterface &$form_state) {
     // throwing an exception.
     // @see Drupal\Core\EventSubscriber\EnforcedFormResponseSubscriber
     if ($form instanceof Response) {
-      throw new EnforcedResponseException($response);
+      throw new EnforcedResponseException($form);
     }
     $form['#form_id'] = $form_id;