diff --git a/scripts/upgrade b/scripts/upgrade
index 30ef8cb..04a737e 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -20,6 +20,7 @@ domain=$(ynh_app_setting_get --app=$app --key=domain)
 path_url=$(ynh_app_setting_get --app=$app --key=path)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 port_web=$(ynh_app_setting_get --app=$app --key=port_web)
+port_rend=$(ynh_app_setting_get --app=$app --key=port_rend)
 vlc_required=$(ynh_app_setting_get --app=$app --key=vlc)
 
 if [ "$vlc_required" -eq 1 ] ; then