diff --git a/inventory/group_vars/all b/inventory/group_vars/all
index fedcf44d7c..1673c86f44 100644
--- a/inventory/group_vars/all
+++ b/inventory/group_vars/all
@@ -42,6 +42,7 @@ use_default_epel: true
 udp_ports: []
 tcp_ports: []
 custom_rules: []
+nat_rules: []
 custom6_rules: []
 
 # defaults for virt installs