diff --git a/contrib/terraform/openstack/modules/network/main.tf b/contrib/terraform/openstack/modules/network/main.tf
index 2c461c784..7c02869d4 100644
--- a/contrib/terraform/openstack/modules/network/main.tf
+++ b/contrib/terraform/openstack/modules/network/main.tf
@@ -12,7 +12,7 @@ resource "openstack_networking_network_v2" "k8s" {
 resource "openstack_networking_subnet_v2" "k8s" {
   name            = "${var.cluster_name}-internal-network"
   network_id      = "${openstack_networking_network_v2.k8s.id}"
-  cidr            = "10.0.0.0/24"
+  cidr            = "${var.subnet_cidr}"
   ip_version      = 4
   dns_nameservers = "${var.dns_nameservers}"
 }
diff --git a/contrib/terraform/openstack/modules/network/variables.tf b/contrib/terraform/openstack/modules/network/variables.tf
index a7952bced..c8382b15e 100644
--- a/contrib/terraform/openstack/modules/network/variables.tf
+++ b/contrib/terraform/openstack/modules/network/variables.tf
@@ -7,3 +7,8 @@ variable "cluster_name" {}
 variable "dns_nameservers" {
   type = "list"
 }
+
+variable "subnet_cidr" {
+  type = "string"
+  default = "10.0.0.0/24"
+}