diff --git a/install/update.php b/install/update.php
index 75dede1f6659ac8d24b2e04d0a2ec00e9e35663f..4b7ad1c0d347379d27a7c5202aaa0a8a58e22643 100644
--- a/install/update.php
+++ b/install/update.php
@@ -162,7 +162,7 @@ if($conf['timezone'] == '{timezone}' or trim($conf['timezone']) == '') $conf['ti
 $conf['language_file_import_enabled'] = (isset($conf_old['language_file_import_enabled']))?$conf_old['language_file_import_enabled']:true;
 
 if(isset($conf_old["dbmaster_host"])) $conf["mysql"]["master_host"] = $conf_old["dbmaster_host"];
-if(isset($conf_old["dbmaster_port"])) $conf["mysql"]["master_host"] = $conf_old["dbmaster_port"];
+if(isset($conf_old["dbmaster_port"])) $conf["mysql"]["master_port"] = $conf_old["dbmaster_port"];
 if(isset($conf_old["dbmaster_database"])) $conf["mysql"]["master_database"] = $conf_old["dbmaster_database"];
 if(isset($conf_old["dbmaster_user"])) $conf["mysql"]["master_ispconfig_user"] = $conf_old["dbmaster_user"];
 if(isset($conf_old["dbmaster_password"])) $conf["mysql"]["master_ispconfig_password"] = $conf_old["dbmaster_password"];