diff --git a/scripts/upgrade b/scripts/upgrade
index 29bc6be..8979e25 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=$(ynh_app_setting_get --app=$app --key=port)
+mpd_port=$(ynh_app_setting_get --app=$app --key=mpd_port)
 
 # other variables
 media_dir="/home/yunohost.multimedia/share/Music"
@@ -45,10 +46,10 @@ upgrade_type=$(ynh_check_app_version_changed)
 #
 
 # If db_name doesn't exist, create it
-#if [ -z "$db_name" ]; then
-#	db_name=$(ynh_sanitize_dbid --db_name=$app)
-#	ynh_app_setting_set --app=$app --key=db_name --value=$db_name
-#fi
+if [ -z "$mpd_port" ]; then
+	mpd_port=0
+	ynh_app_setting_set --app=$app --key=mpd_port --value=$mpd_port
+fi
 
 #=================================================
 # BACKUP BEFORE UPGRADE THEN ACTIVE TRAP