diff --git a/system/Helpers/url_helper.php b/system/Helpers/url_helper.php
index ed095962c731..b75a3a75f1c4 100644
--- a/system/Helpers/url_helper.php
+++ b/system/Helpers/url_helper.php
@@ -74,8 +74,8 @@ function _get_uri(string $relativePath = '', ?App $config = null): URI
     /**
      * Returns a site URL as defined by the App config.
      *
-     * @param mixed    $relativePath URI string or array of URI segments
-     * @param App|null $config       Alternate configuration to use
+     * @param array|string $relativePath URI string or array of URI segments
+     * @param App|null     $config       Alternate configuration to use
      */
     function site_url($relativePath = '', ?string $scheme = null, ?App $config = null): string
     {