diff --git a/main.tf b/main.tf
index e117edc..d4a2ae9 100644
--- a/main.tf
+++ b/main.tf
@@ -1,6 +1,6 @@
 locals {
   // Get distinct list of domains and SANs
-  distinct_domain_names = distinct(concat([var.domain_name], [for s in var.subject_alternative_names : replace(s, "*.", "")]))
+  distinct_domain_names = distinct(concat([replace(var.domain_name, "*.", "")], [for s in var.subject_alternative_names : replace(s, "*.", "")]))
 
   // Copy domain_validation_options for the distinct domain names
   validation_domains = var.create_certificate ? [for k, v in aws_acm_certificate.this[0].domain_validation_options : tomap(v) if contains(local.distinct_domain_names, replace(v.domain_name, "*.", ""))] : []