diff --git a/s3-flow-logs/main.tf b/s3-flow-logs/main.tf
index 23cf53e..21f1bee 100644
--- a/s3-flow-logs/main.tf
+++ b/s3-flow-logs/main.tf
@@ -42,7 +42,7 @@
 
 locals {
   account_id          = var.account_id != "" ? var.account_id : data.aws_caller_identity.current.account_id
-  regions             = [for r in data.aws_regions.current : r if startswith(r, "us-")]
+  regions             = [for r in tolist(data.aws_regions.current) : r if startswith(r, "us-")]
   region              = data.aws_region.current.name
   account_environment = data.aws_arn.current.partition == "aws-us-gov" ? "gov" : "ew"