diff --git a/core/modules/update/src/Form/UpdateReady.php b/core/modules/update/src/Form/UpdateReady.php
index 7a249d1..3afdf3d 100644
--- a/core/modules/update/src/Form/UpdateReady.php
+++ b/core/modules/update/src/Form/UpdateReady.php
@@ -69,6 +69,7 @@ public function getFormID() {
    */
   public static function create(ContainerInterface $container) {
     return new static(
+      $container->getParameter('app.root'),
       $container->get('module_handler'),
       $container->get('state')
     );