diff --git a/docker_autoscaler.tf b/docker_autoscaler.tf
index b7b71577e..411f36fc1 100644
--- a/docker_autoscaler.tf
+++ b/docker_autoscaler.tf
@@ -38,7 +38,7 @@ resource "aws_launch_template" "this" {
       iops        = contains(["gp3", "io1", "io2"], var.runner_worker_docker_autoscaler_instance.volume_type) ? var.runner_worker_docker_autoscaler_instance.volume_iops : null
       throughput  = var.runner_worker_docker_autoscaler_instance.volume_type == "gp3" ? var.runner_worker_docker_autoscaler_instance.volume_throughput : null
       encrypted   = true
-      kms_key_id  = local.kms_key_arn
+      kms_key_id  = local.kms_key_arn != "" ? local.kms_key_arn : null
     }
   }