diff --git a/scripts/change_url b/scripts/change_url
index f6b8b78..7fd1806 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -28,6 +28,7 @@ ynh_script_progression --message="Loading installation settings..."  --weight=1
 
 # Needed for helper "ynh_add_nginx_config"
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
+port=$(ynh_app_setting_get --app=$app --key=port)
 
 #=================================================
 # BACKUP BEFORE CHANGE URL THEN ACTIVE TRAP