diff --git a/src/psm/Service/Database.php b/src/psm/Service/Database.php
index afb022a7..c15348e0 100644
--- a/src/psm/Service/Database.php
+++ b/src/psm/Service/Database.php
@@ -35,6 +35,12 @@ class Database {
 	 */
 	protected $db_host;
 
+	/**
+	 * DB port
+	 * @var string $db_port
+	 */
+	protected $db_port;
+
 	/**
 	 * DB name
 	 * @var string $db_name