diff --git a/cloudtrail-key/main.tf b/cloudtrail-key/main.tf
index 5489854..6b780e4 100644
--- a/cloudtrail-key/main.tf
+++ b/cloudtrail-key/main.tf
@@ -55,7 +55,7 @@ locals {
   partition           = data.aws_arn.current.partition
 
   name                = var.name == null ? format("%v-%v", lookup(local._defaults["cloudtrail"], "name"), local.region) : var.name
-  kms_key_name        = format("%v%v", local._defaults["kms"], local.name)
+  kms_key_name        = format("%v%v", local._prefixes["kms"], local.name)
   kms_admin_root      = format("arn:%v:iam::%v:root", local.partition, local.account_id)
   kms_admin_roles     = compact(concat([local.kms_admin_root], var.kms_admin_roles))
   kms_policy_document = var.kms_policy_document != null ? var.kms_policy_document : data.aws_iam_policy_document.empty.json