diff --git a/vpc-transit-gateway-association/self/data.prefix_lists.tf b/vpc-transit-gateway-association/self/data.prefix_lists.tf
index 6af9487..b4a3c6d 100644
--- a/vpc-transit-gateway-association/self/data.prefix_lists.tf
+++ b/vpc-transit-gateway-association/self/data.prefix_lists.tf
@@ -2,7 +2,7 @@ data "aws_ec2_managed_prefix_lists" "tgw_crossregion_env" {
   for_each = toset(local._defaults["transit-gateway-environments"])
   filter {
     name   = "prefix-list-name"
-    values = [format("%v.crossregion.transit-gateway.%v", each.key, var.tgw_label)]
+    values = [format("%v.crossregion.transit-gateway.%v", each.key, var.transit_gateway_label)]
   }
 }