diff --git a/vpn-transit-gateway/vpn-config.tf b/vpn-transit-gateway/vpn-config.tf
index d74c5a2..d488fe6 100644
--- a/vpn-transit-gateway/vpn-config.tf
+++ b/vpn-transit-gateway/vpn-config.tf
@@ -1,6 +1,6 @@
 locals {
-  single_vpn_tunnel_loopback   = coalesce([for k, v in local.vpn_settings : v.tunnel_loopback])
-  single_vpn_tunnel_ip_address = coalesce([for k, v in local.vpn_settings : v.ip_address])
+  single_vpn_tunnel_loopback   = try(element([for k, v in local.vpn_settings : v.tunnel_loopback], 0), "")
+  single_vpn_tunnel_ip_address = try(element([for k, v in local.vpn_settings : v.ip_address], 0), "")
   vpn_tunnel_outputs = { for k, v in local.vpn_settings : k => {
     vpn_name          = k
     site              = v.site