diff --git a/src/Symfony/Component/HttpKernel/EventListener/ErrorListener.php b/src/Symfony/Component/HttpKernel/EventListener/ErrorListener.php
index 8bac8afe268e9..6b44a85791dc7 100644
--- a/src/Symfony/Component/HttpKernel/EventListener/ErrorListener.php
+++ b/src/Symfony/Component/HttpKernel/EventListener/ErrorListener.php
@@ -35,7 +35,7 @@ class ErrorListener implements EventSubscriberInterface
     protected $debug;
     protected $exceptionsMapping;
 
-    public function __construct(string|object|array $controller, LoggerInterface $logger = null, bool $debug = false, array $exceptionsMapping = [])
+    public function __construct(string|object|array|null $controller, LoggerInterface $logger = null, bool $debug = false, array $exceptionsMapping = [])
     {
         $this->controller = $controller;
         $this->logger = $logger;