diff --git a/examples/full-setup-tf-upgrade/variables.vpc.auto.tfvars b/examples/full-setup-tf-upgrade/variables.vpc.auto.tfvars
index 8aeb5af..488bb9f 100644
--- a/examples/full-setup-tf-upgrade/variables.vpc.auto.tfvars
+++ b/examples/full-setup-tf-upgrade/variables.vpc.auto.tfvars
@@ -13,6 +13,9 @@ vpc_enable_vpn         = true
 vpc_enable_vpn_routing = true
 vpc_enable_awsdns      = true
 availability_zones     = []
+
+tgw_enable_vpn_routing = false
+tgw_environment        = null
 shared_vpc_label       = ""
 
 vpn_settings = [
diff --git a/examples/full-setup-tf-upgrade/variables.vpc.tf b/examples/full-setup-tf-upgrade/variables.vpc.tf
index e90c533..0ff0777 100644
--- a/examples/full-setup-tf-upgrade/variables.vpc.tf
+++ b/examples/full-setup-tf-upgrade/variables.vpc.tf
@@ -96,5 +96,5 @@ variable "peer_settings" {
 variable "shared_vpc_label" {
   description = "Label to use for shared VPC for flowlogs and other things"
   type        = string
-  default     = ""
+  default     = null
 }