diff --git a/cloudtrail/additional-sqs.tf b/cloudtrail/additional-sqs.tf
index 58698d2..c61d475 100644
--- a/cloudtrail/additional-sqs.tf
+++ b/cloudtrail/additional-sqs.tf
@@ -96,7 +96,7 @@ data "aws_iam_policy_document" "additional_cloudtrail_sqs" {
 }
 
 resource "aws_sns_topic_subscription" "additional_cloudtrail_sqs" {
-  for_each  = var.enable_sns ? local.additional_sqs_names : {}
+  for_each  = var.enable_sns ? local.additional_sqs_names : toset([])
   protocol  = "sqs"
   topic_arn = var.enable_sns ? aws_sns_topic.cloudtrail[0].arn : null
   endpoint  = var.enable_sqs ? aws_sqs_queue.additional_cloudtrail[each.key].arn : null