diff --git a/classes/dns_util.php b/classes/dns_util.php
index 7e13ab7..52dc1e8 100644
--- a/classes/dns_util.php
+++ b/classes/dns_util.php
@@ -231,7 +231,7 @@ public function get_dmarc_dns_record() {
             $parts = explode('.', $domain);
             $domain = join('.', array_slice($parts, 1));
         }
-        return ['', ''];
+        return ['', '', ''];
     }
 
     /**