diff --git a/solutions/fully-configurable/variables.tf b/solutions/fully-configurable/variables.tf
index 545b54ec..cc91c826 100644
--- a/solutions/fully-configurable/variables.tf
+++ b/solutions/fully-configurable/variables.tf
@@ -181,7 +181,7 @@ variable "default_worker_pool_workers_per_zone" {
 variable "default_worker_pool_operating_system" {
   type        = string
   description = "The operating system installed on the worker nodes. [Learn more](https://cloud.ibm.com/docs/openshift?topic=openshift-vpc-flavors)"
-  default     = "RHEL_9_64"
+  default     = "RHCOS"
 }
 
 variable "default_worker_pool_labels" {