diff --git a/core/modules/system/lib/Drupal/system/FileDownloadController.php b/core/modules/system/lib/Drupal/system/FileDownloadController.php
index c4f7719..8bff1bb 100644
--- a/core/modules/system/lib/Drupal/system/FileDownloadController.php
+++ b/core/modules/system/lib/Drupal/system/FileDownloadController.php
@@ -60,7 +60,7 @@ public static function create(ContainerInterface $container) {
    *
    * @param \Symfony\Component\HttpFoundation\Request $request
    *   The request object.
-   * @param int|string $scheme
+   * @param string $scheme
    *   The file scheme, defaults to 'private'.
    *
    * @throws \Symfony\Component\HttpKernel\Exception\NotFoundHttpException