diff --git a/src/Symfony/Component/Messenger/DependencyInjection/MessengerPass.php b/src/Symfony/Component/Messenger/DependencyInjection/MessengerPass.php
index a0dff8ac9ad83..1bc71fc56fd8d 100644
--- a/src/Symfony/Component/Messenger/DependencyInjection/MessengerPass.php
+++ b/src/Symfony/Component/Messenger/DependencyInjection/MessengerPass.php
@@ -51,6 +51,12 @@ public function process(ContainerBuilder $container)
             $container->removeDefinition('messenger.middleware.debug.logging');
         }
 
+        if (!$container->has('serializer')) {
+            $container->removeDefinition('messenger.transport.serialize_message_with_type_in_headers');
+            $container->removeAlias('messenger.transport.default_encoder');
+            $container->removeAlias('messenger.transport.default_decoder');
+        }
+
         $this->registerReceivers($container);
         $this->registerHandlers($container);
     }