diff --git a/src/Symfony/Component/EventDispatcher/Attribute/AsEventListener.php b/src/Symfony/Component/EventDispatcher/Attribute/AsEventListener.php
index f42d4bddd2556..3a6dcc5b7ab29 100644
--- a/src/Symfony/Component/EventDispatcher/Attribute/AsEventListener.php
+++ b/src/Symfony/Component/EventDispatcher/Attribute/AsEventListener.php
@@ -22,7 +22,7 @@ class AsEventListener
     public function __construct(
         public ?string $event = null,
         public ?string $method = null,
-        public int $priority = 0,
+        public ?int $priority = null,
         public ?string $dispatcher = null,
     ) {
     }