diff --git a/libraries/config/messages.inc.php b/libraries/config/messages.inc.php
index fe6ccaf659..edc5b56de4 100644
--- a/libraries/config/messages.inc.php
+++ b/libraries/config/messages.inc.php
@@ -386,7 +386,7 @@ $strConfigServers_controluser_desc = __('A special MySQL user configured with li
 $strConfigServers_controluser_name = __('Control user');
 $strConfigServers_controlhost_desc = __('An alternate host to hold the configuration storage; leave blank to use the already defined host');
 $strConfigServers_controlhost_name = __('Control host');
-$strConfigServers_controlport_desc = __('An alternate port to connect to the host that holds the configuration storage; leave blank to use the already defined port');
+$strConfigServers_controlport_desc = __('An alternate port to connect to the host that holds the configuration storage; leave blank to use the default port, or the already defined port, if the controlhost equals host');
 $strConfigServers_controlport_name = __('Control port');
 $strConfigServers_CountTables_desc = __('Count tables when showing database list');
 $strConfigServers_CountTables_name = __('Count tables');