diff --git a/ct/headscale.sh b/ct/headscale.sh
index d83fc330e..253eeef9f 100644
--- a/ct/headscale.sh
+++ b/ct/headscale.sh
@@ -13,6 +13,7 @@ var_disk="${var_disk:-2}"
 var_os="${var_os:-debian}"
 var_version="${var_version:-13}"
 var_unprivileged="${var_unprivileged:-1}"
+var_tun="${var_tun:-yes}"
 
 header_info "$APP"
 variables