diff --git a/service_container/autowiring.rst b/service_container/autowiring.rst
index b14c1b5423d..483a68c26e9 100644
--- a/service_container/autowiring.rst
+++ b/service_container/autowiring.rst
@@ -694,7 +694,7 @@ attribute::
     {
         public function __construct(
             #[AutowireServiceClosure('third_party.remote_message_formatter')]
-            \Closure $messageFormatterResolver
+            private \Closure $messageFormatterResolver
         ) {
         }