diff --git a/certbot-dns-route53/certbot_dns_route53/dns_route53.py b/certbot-dns-route53/certbot_dns_route53/dns_route53.py
index f71935de2..4417713ef 100644
--- a/certbot-dns-route53/certbot_dns_route53/dns_route53.py
+++ b/certbot-dns-route53/certbot_dns_route53/dns_route53.py
@@ -53,7 +53,7 @@ class Authenticator(dns_common.DNSAuthenticator):
         try:
             change_ids = [
                 self._change_txt_record("UPSERT",
-                  achall.validation_domain_name(achall.domain),
+                  self.validation_domain_name(achall),
                   achall.validation(achall.account_key))
                 for achall in achalls
             ]