diff --git a/flowlogs-role/main.tf b/flowlogs-role/main.tf
index e808267..7f0b54c 100644
--- a/flowlogs-role/main.tf
+++ b/flowlogs-role/main.tf
@@ -98,7 +98,7 @@ data "aws_iam_policy_document" "flowlogs_assume" {
     actions = ["sts:AssumeRole"]
     principals {
       type        = "Service"
-      identifiers = concat(list("vpc-flow-logs.amazonaws.com"), formatlist("logs.%v.amazonaws.com", local.flowlogs_regions))
+      identifiers = concat(["vpc-flow-logs.amazonaws.com"], formatlist("logs.%v.amazonaws.com", local.flowlogs_regions))
     }
   }
 }