diff --git a/vpc-transit-gateway-association/self/routing.tf b/vpc-transit-gateway-association/self/routing.tf
index 732ddbc..d8d8250 100644
--- a/vpc-transit-gateway-association/self/routing.tf
+++ b/vpc-transit-gateway-association/self/routing.tf
@@ -89,8 +89,9 @@ resource "aws_ec2_transit_gateway_prefix_list_reference" "vpc_self_own_env" {
   provider = aws.self
   for_each = { for k in local.selected_rt : k => var.data_input.map_route_tables_self[k] if k == var.transit_gateway_environment }
 
-  prefix_list_id                = data.aws_ec2_managed_prefix_list.tgw_crossregion_env[each.key].id
-  transit_gateway_attachment_id = data.aws_ec2_transit_gateway_peering_attachment.attachment_peer.id
+  prefix_list_id                 = data.aws_ec2_managed_prefix_list.tgw_crossregion_env[each.key].id
+  transit_gateway_attachment_id  = data.aws_ec2_transit_gateway_peering_attachment.attachment_peer.id
+  transit_gateway_route_table_id = each.value
 }
 
 #---