diff --git a/master.tf b/master.tf
index 73a59d4..74b2672 100644
--- a/master.tf
+++ b/master.tf
@@ -308,7 +308,7 @@ data "template_file" "kube-apiserver" {
     hyperkube_image_tag   = var.hyperkube_image_tag
     etcd_endpoints        = join(",", formatlist("https://%s:2379", var.etcd_addresses))
     service_network       = var.service_network
-    master_address        = var.master_address
+    master_address        = var.external_apiserver_address == "" ? var.master_address : var.external_apiserver_address
     master_instance_count = var.master_instance_count
     cloud_provider        = var.cloud_provider
     oidc_issuer_url       = var.oidc_issuer_url
diff --git a/variables.tf b/variables.tf
index ae1e12e..e8fbf61 100644
--- a/variables.tf
+++ b/variables.tf
@@ -71,6 +71,11 @@ variable "master_address" {
   description = "The address of the kubernetes API server, typically of their load balancer. Used by the worker kubelet."
 }
 
+variable "external_apiserver_address" {
+  description = "The external address passed to apiservers to use when generating externalized URLs. If nothing passed the master_address will be used."
+  default     = ""
+}
+
 variable "cloud_provider" {
   description = "The cloud provider. Used by the API Server, the Controller Manager and kubelet."
   default     = ""