diff --git a/scripts/miaou b/scripts/miaou
index 312612b..3b8fa4b 100755
--- a/scripts/miaou
+++ b/scripts/miaou
@@ -209,7 +209,7 @@ function build_dmz_certbot {
             subDomain=${fqdn%".${domain}"}
 
             echo "TODO: fqdn=${fqdn}, domain=${domain}"
-            local server_ip public_hostname
+            local server_ip
             server_ip=$(dig +short A "$fqdn")
 
             if [[ $server_ip == "$my_ip" ]]; then