diff --git a/src/Symfony/Component/Messenger/EventListener/ResetServicesListener.php b/src/Symfony/Component/Messenger/EventListener/ResetServicesListener.php
index 19b7ebe94c96..7bee4ccfdf2d 100644
--- a/src/Symfony/Component/Messenger/EventListener/ResetServicesListener.php
+++ b/src/Symfony/Component/Messenger/EventListener/ResetServicesListener.php
@@ -41,7 +41,7 @@ public function resetServices(AbstractWorkerMessageEvent $event)
         $this->servicesResetter->reset();
     }
 
-    public static function getSubscribedEvents()
+    public static function getSubscribedEvents(): array
     {
         return [
             WorkerMessageHandledEvent::class => ['resetServices'],