diff --git a/src/Symfony/Component/Cache/Traits/ProxyTrait.php b/src/Symfony/Component/Cache/Traits/ProxyTrait.php
index 06dba7e59b..d9e085b9ea 100644
--- a/src/Symfony/Component/Cache/Traits/ProxyTrait.php
+++ b/src/Symfony/Component/Cache/Traits/ProxyTrait.php
@@ -16,6 +16,8 @@ use Symfony\Component\Cache\ResettableInterface;
 
 /**
  * @author Nicolas Grekas <p@tchwork.com>
+ *
+ * @internal
  */
 trait ProxyTrait
 {