diff --git a/vpc-interface-endpoint/main.tf b/vpc-interface-endpoint/main.tf
index 6f6c75c..eca2f9f 100644
--- a/vpc-interface-endpoint/main.tf
+++ b/vpc-interface-endpoint/main.tf
@@ -58,7 +58,7 @@ locals {
   region              = data.aws_region.current.name
 
   service_parts      = split(".", var.service)
-  service            = length(local.service_parts) == 1 ? format("com.amazonaws.%v.%v", local.region, var.service) : var.service
+  service            = length(local.service_parts) <= 2 ? format("com.amazonaws.%v.%v", local.region, var.service) : var.service
   full_service_parts = split(".", local.service)
 
   #  short_service = length(regexall("^com.amazonaws", var.service)) == 0 ? var.service : replace(local.service, format("com.amazonaws.%v.", local.region), "")