diff --git a/common/kms.tf b/common/kms.tf
index fd8f3ce..7cd1201 100644
--- a/common/kms.tf
+++ b/common/kms.tf
@@ -4,6 +4,7 @@
 # }
 # 
 locals {
+  __prefixes   = merge(local._prefixes, var.override_prefixes)
   kms_key_arn  = var.kms_key_arn == null ? try(aws_kms_key.key[0].arn, "") : var.kms_key_arn
   kms_key_name = format("%s%s", local.__prefixes["kms"], local.name)