diff --git a/src/Symfony/Component/Routing/Loader/Configurator/Traits/LocalizedRouteTrait.php b/src/Symfony/Component/Routing/Loader/Configurator/Traits/LocalizedRouteTrait.php
index 35ddbf2a99..d9ea5577f8 100644
--- a/src/Symfony/Component/Routing/Loader/Configurator/Traits/LocalizedRouteTrait.php
+++ b/src/Symfony/Component/Routing/Loader/Configurator/Traits/LocalizedRouteTrait.php
@@ -15,6 +15,8 @@ use Symfony\Component\Routing\Route;
 use Symfony\Component\Routing\RouteCollection;
 
 /**
+ * @internal
+ *
  * @author Nicolas Grekas <p@tchwork.com>
  * @author Jules Pietri <jules@heahprod.com>
  */
diff --git a/src/Symfony/Component/Routing/Loader/Configurator/Traits/PrefixTrait.php b/src/Symfony/Component/Routing/Loader/Configurator/Traits/PrefixTrait.php
index eb329d69b3..5c109f942f 100644
--- a/src/Symfony/Component/Routing/Loader/Configurator/Traits/PrefixTrait.php
+++ b/src/Symfony/Component/Routing/Loader/Configurator/Traits/PrefixTrait.php
@@ -15,6 +15,8 @@ use Symfony\Component\Routing\Route;
 use Symfony\Component\Routing\RouteCollection;
 
 /**
+ * @internal
+ *
  * @author Nicolas Grekas <p@tchwork.com>
  */
 trait PrefixTrait