diff --git a/core/lib/Drupal/Core/DependencyInjection/Compiler/StackedKernelPass.php b/core/lib/Drupal/Core/DependencyInjection/Compiler/StackedKernelPass.php
index 56c563a..cbca2ae 100644
--- a/core/lib/Drupal/Core/DependencyInjection/Compiler/StackedKernelPass.php
+++ b/core/lib/Drupal/Core/DependencyInjection/Compiler/StackedKernelPass.php
@@ -43,16 +43,14 @@ public function process(ContainerBuilder $container) {
       array_multisort($priorities, SORT_ASC, $middlewares);
 
       $previous_id = 'http_kernel';
-      $first = $http_kernel = $container->getDefinition('http_kernel');
-
-      foreach ($middlewares as $id => $decorator) {
+      foreach ($middlewares as $id => $middleware) {
         // Prepend the previous kernel as first constructor argument.
-        $arguments = $decorator->getArguments();
+        $arguments = $middleware->getArguments();
         array_unshift($arguments, new Reference($previous_id));
-        $decorator->setArguments($arguments);
+        $middleware->setArguments($arguments);
+        $middleware->setPublic(FALSE);
 
         $previous_id = $id;
-        $http_kernel = $decorator;
       }
 
       // Register the 'stack' service as being the very first one http stacked