diff --git a/config.default.php b/config.default.php
index af24ac0c3..ded6910a2 100644
--- a/config.default.php
+++ b/config.default.php
@@ -108,6 +108,9 @@ define('LDAP_AUTH', false);
 // LDAP server protocol, hostname and port URL (ldap[s]://hostname:port)
 define('LDAP_SERVER', '');
 
+// LDAP server port (389 by default)
+define('LDAP_PORT', 389);
+
 // By default, require certificate to be verified for ldaps:// style URL. Set to false to skip the verification
 define('LDAP_SSL_VERIFY', true);