diff --git a/src/Loop.php b/src/Loop.php
index fa9593b..aaf9bc0 100644
--- a/src/Loop.php
+++ b/src/Loop.php
@@ -81,6 +81,8 @@ final class Loop
     /**
      * Create a new driver if a factory is present, otherwise throw.
      *
+     * @return Driver
+     *
      * @throws \Exception If no factory is set or no driver returned from factory.
      */
     private static function createDriver()