diff --git a/src/Definition/Resolver/AliasedInterface.php b/src/Definition/Resolver/AliasedInterface.php
index feed83ba0..dd383ab8b 100644
--- a/src/Definition/Resolver/AliasedInterface.php
+++ b/src/Definition/Resolver/AliasedInterface.php
@@ -11,6 +11,8 @@ interface AliasedInterface
      *
      * For instance:
      * array('myMethod' => 'myAlias')
+     *
+     * @return list<string>
      */
     public static function getAliases(): array;
 }