diff --git a/main.tf b/main.tf
index f6c1a7d..672a260 100644
--- a/main.tf
+++ b/main.tf
@@ -94,12 +94,14 @@ module "iam_role" {
 
   use_fullname = true
 
-  policy_documents = [
+  policy_documents = var.create_sns_topic ? [
     data.aws_iam_policy_document.config_s3_policy[0].json,
     data.aws_iam_policy_document.config_sns_policy[0].json
+    ] : [
+    data.aws_iam_policy_document.config_s3_policy[0].json
   ]
 
-  policy_document_count = 2
+  policy_document_count = var.create_sns_topic ? 2 : 1
   policy_description    = "AWS Config IAM policy"
   role_description      = "AWS Config IAM role"