diff --git a/cloudtrail/sns.tf b/cloudtrail/sns.tf
index 5734a14..2a49760 100644
--- a/cloudtrail/sns.tf
+++ b/cloudtrail/sns.tf
@@ -11,7 +11,7 @@ resource "aws_sns_topic" "cloudtrail" {
 
 resource "aws_sns_topic_policy" "cloudtrail" {
   count  = var.enable_sns ? 1 : 0
-  arn    = aws_sns_topic.cloudtrail.arn
+  arn    = var.enable_sns ? aws_sns_topic.cloudtrail[0].arn : null
   policy = data.aws_iam_policy_document.cloudtrail_topic.json
 }