diff --git a/peer/data.peer.tf b/peer/data.peer.tf
index 075cd04..e8a40d6 100644
--- a/peer/data.peer.tf
+++ b/peer/data.peer.tf
@@ -47,7 +47,7 @@ data "aws_network_acls" "default_peer_network_acls" {
     values = local.peer_subnets
   }
   dynamic "filter" {
-    for_each = length(var.peer_network_acl_filter) > 0 ? toset({ 1 = 1 }) : toset({})
+    for_each = length(var.peer_network_acl_filter) > 0 ? toset(["1"]) : toset([])
     iterator = f
     content {
       name   = "tag:Name"