diff --git a/modules/device/tunnel.tf b/modules/device/tunnel.tf
index 14ae4a7..b9e8014 100644
--- a/modules/device/tunnel.tf
+++ b/modules/device/tunnel.tf
@@ -119,5 +119,6 @@ resource "netbox_vpn_tunnel_termination" "site" {
   tunnel_id = each.value.id
   role      = "peer"
 
-  device_interface_id = netbox_device_interface.tunnels[each.key].id
+  device_interface_id   = netbox_device_interface.tunnels[each.key].id
+  outside_ip_address_id = netbox_ip_address.gre_dnat.id
 }