diff --git a/locals.tf b/locals.tf
index 29fbeb7..5520b6f 100644
--- a/locals.tf
+++ b/locals.tf
@@ -86,7 +86,7 @@ locals {
       docker_machine_options         = length(var.docker_machine_options) == 0 ? "" : local.docker_machine_options_string
       runners_service_account        = google_service_account.agent.email
       runners_additional_volumes     = local.runners_additional_volumes
-      runners_docker_machine_image   = var.docker_machine_image
+      runners_docker_machine_image   = var.runner_machine_image
       runners_name                   = var.runners_name
       runners_executor               = var.runners_executor
       runners_limit                  = var.runners_limit
diff --git a/variables.tf b/variables.tf
index aee130a..cca96bb 100644
--- a/variables.tf
+++ b/variables.tf
@@ -79,10 +79,10 @@ variable "docker_machine_preemptible" {
   default     = false
 }
 
-variable "docker_machine_image" {
-  description = "A GCP custom image to use for spinning up docker-machines"
+variable "runner_machine_image" {
+  description = "A GCP custom image to use for spinning up runners when using docker-machine"
   type        = string
-  default     = ""
+  default     = "ubuntu-os-cloud/global/images/ubuntu-2004-focal-v20220419"
 }
 
 variable "docker_machine_disk_type" {