diff --git a/core/modules/image/lib/Drupal/image/Controller/ImageStyleDownloadController.php b/core/modules/image/lib/Drupal/image/Controller/ImageStyleDownloadController.php
index 2adf7d9..c95eeab 100644
--- a/core/modules/image/lib/Drupal/image/Controller/ImageStyleDownloadController.php
+++ b/core/modules/image/lib/Drupal/image/Controller/ImageStyleDownloadController.php
@@ -117,7 +117,7 @@ public function deliver(Request $request, $scheme, ImageStyleInterface $image_st
     // control access to the file.
     if ($scheme == 'private') {
       if (file_exists($derivative_uri)) {
-        return $this->fileDownload($request, $scheme);
+        return parent::deliver($request, $scheme);
       }
       else {
         $headers = $this->moduleHandler->invokeAll('file_download', array($image_uri));