diff --git a/src/main.tf b/src/main.tf
index 1b1d1e6..dde48f3 100644
--- a/src/main.tf
+++ b/src/main.tf
@@ -30,7 +30,7 @@ module "acm" {
   process_domain_validation_options = var.process_domain_validation_options
   ttl                               = 300
   subject_alternative_names         = local.all_sans
-  zone_id                           = join("", data.aws_route53_zone.default.*.zone_id)
+  zone_id                           = join("", data.aws_route53_zone.default[*].zone_id)
 
   context = module.this.context
 }