diff --git a/src/helpers.php b/src/helpers.php
index a7aa7a86..bed037f3 100644
--- a/src/helpers.php
+++ b/src/helpers.php
@@ -33,8 +33,8 @@ if (!function_exists('config')) {
      *
      * If an array is passed as the key, we will assume you want to set an array of values.
      *
-     * @param array|string $key
-     * @param mixed        $default
+     * @param array|string|void $key
+     * @param mixed             $default
      *
      * @return mixed
      */