diff --git a/vpc-transit-gateway-association/self/routing.tf b/vpc-transit-gateway-association/self/routing.tf
index 0ddb088..32ad416 100644
--- a/vpc-transit-gateway-association/self/routing.tf
+++ b/vpc-transit-gateway-association/self/routing.tf
@@ -72,13 +72,13 @@ resource "aws_route" "gateway_vpn_ipv4" {
 # routing using prefix lists.  We want cross-region prefix lists.  For services, we create a cross-region prefix list to the
 # peer TGW for every environment.   For non-services, we create, we create that for services and the env.
 # this is done only once, at the TGW main configuration.
-# ENV RT -> services
+# ENV RT -> services prefix route
 #---
 resource "aws_ec2_transit_gateway_prefix_list_reference" "vpc_self_common" {
   provider = aws.self
-  for_each = local.create_prefix_list_routing ? { (var.transit_gateway_environment) = var.data_input.map_route_tables_self["services"] } : {}
+  for_each = local.create_prefix_list_routing ? { (var.transit_gateway_environment) = var.data_input.map_route_tables_self[var.transit_gateway_environment] } : {}
 
-  prefix_list_id                 = data.aws_ec2_managed_prefix_list.tgw_crossregion_env[each.key].id
+  prefix_list_id                 = data.aws_ec2_managed_prefix_list.tgw_crossregion_env["services"].id
   transit_gateway_attachment_id  = data.aws_ec2_transit_gateway_peering_attachment.attachment_peer.id
   transit_gateway_route_table_id = each.value
 }
@@ -107,3 +107,4 @@ resource "aws_ec2_transit_gateway_prefix_list_reference" "vpc_self_all" {
   #  transit_gateway_route_table_id = each.value
   transit_gateway_route_table_id = var.data_input.map_route_tables_self["services"]
 }
+