diff --git a/examples/full-cluster-tf-upgrade/README.md b/examples/full-cluster-tf-upgrade/README.md
index ab9bd75..67e8746 100644
--- a/examples/full-cluster-tf-upgrade/README.md
+++ b/examples/full-cluster-tf-upgrade/README.md
@@ -14,6 +14,7 @@ There are a number of steps to end up with a cluster.
    1. Copy the [includes.d structure](#copy-includesd)
 1. In the submodule repository, in the `vpc/{region}/vpc{number}/apps/{clustername}` directory
    1. Update `settings.auto.tfvars`
+   1. Update `includes.d/parent_rs.tf`
    1. Initialize [Cluster Main](#initialize-cluster-main) directory
    1. Create [policies](#policies)
    1. Create [EC2 Keypair](#keypair-creation)
@@ -130,6 +131,18 @@ These are tracked in the repo cloud-information/aws/documentation/containers/ (f
 
 All the others are subject to your configuration. They are a good starting point, but can vary.
 
+## Update the includes.d/parent_rs.tf file
+
+```hcl
+locals {
+  parent_rs = data.terraform_remote_state.vpc_{region}_vpc{number}_apps_eks-{cluster-name}.outputs
+}
+```
+
+* region: west or east, dependent on which region the VPC is in
+* number: incremental VPC number
+* cluster-name: cluster name, the same as used in the `settings.auto.tfvars` file above
+
 # Terraform Automated Setup
 
 A `tf-run.data` file exists here, so the simplest way to implemnt is with the `tf-run.sh` script.