diff --git a/phpBB/phpbb/db/doctrine/connection_parameter_factory.php b/phpBB/phpbb/db/doctrine/connection_parameter_factory.php
index 4649bbde84..4899f916f4 100644
--- a/phpBB/phpbb/db/doctrine/connection_parameter_factory.php
+++ b/phpBB/phpbb/db/doctrine/connection_parameter_factory.php
@@ -25,7 +25,7 @@ class connection_parameter_factory
 	 * Returns configuration options for Doctrine DBAL.
 	 *
 	 * @param string		$driver		Driver name.
-	 * @param string		$host		Hostname.
+	 * @param string|null	$host		Hostname.
 	 * @param string|null	$user		Username.
 	 * @param string|null	$password	Password.
 	 * @param string|null	$name		Database name.
@@ -61,7 +61,7 @@ class connection_parameter_factory
 	 * Build Doctrine configuration array.
 	 *
 	 * @param array			$params		Parameter array.
-	 * @param string		$host		Database hostname.
+	 * @param string|null	$host		Database hostname.
 	 * @param string|null	$user		Username.
 	 * @param string|null	$password	Password.
 	 * @param string|null	$name		Database name.