diff --git a/inventory/group_vars/bastion b/inventory/group_vars/bastion
index 2866f10cfb..1a87aa47d4 100644
--- a/inventory/group_vars/bastion
+++ b/inventory/group_vars/bastion
@@ -25,6 +25,7 @@ fas_client_groups: sysadmin-ask,sysadmin-web,sysadmin-main,sysadmin-cvs,sysadmin
 # This is a postfix gateway. This will pick up gateway postfix config in base
 #
 postfix_group: gateway
+postfix_transport_filename: transports.gateway
 
 #
 # Set this to get fasclient cron to make the aliases file