diff --git a/usr.sbin/unbound/setup/local-unbound-setup.sh b/usr.sbin/unbound/setup/local-unbound-setup.sh
--- a/usr.sbin/unbound/setup/local-unbound-setup.sh
+++ b/usr.sbin/unbound/setup/local-unbound-setup.sh
@@ -195,7 +195,7 @@
 gen_resolvconf_conf() {
 	local style="$1"
 	do_not_edit
-	echo "resolv_conf=\"/dev/null\" # prevent updating ${resolv_conf}"
+	echo "libc=\"NO\""
 	if [ "${style}" = "dynamic" ] ; then
 		echo "unbound_conf=\"${forward_conf}\""
 		echo "unbound_pid=\"${pidfile}\""