diff --git a/src/Bridge/Doctrine/Orm/Util/QueryNameGeneratorInterface.php b/src/Bridge/Doctrine/Orm/Util/QueryNameGeneratorInterface.php
index cbcc81f8188..63a55b6b538 100644
--- a/src/Bridge/Doctrine/Orm/Util/QueryNameGeneratorInterface.php
+++ b/src/Bridge/Doctrine/Orm/Util/QueryNameGeneratorInterface.php
@@ -20,11 +20,15 @@ interface QueryNameGeneratorInterface
 {
     /**
      * Generates a cacheable alias for DQL join.
+     *
+     * @return literal-string
      */
     public function generateJoinAlias(string $association): string;
 
     /**
      * Generates a cacheable parameter name for DQL query.
+     *
+     * @return literal-string
      */
     public function generateParameterName(string $name): string;
 }