diff --git a/scripts/upgrade b/scripts/upgrade
index 775ed81..399c7fa 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -22,6 +22,7 @@ path_url=$(ynh_app_setting_get --app=$app --key=path)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 datadir=$(ynh_app_setting_get --app=$app --key=datadir)
 db_name=$(ynh_app_setting_get --app=$app --key=db_name)
+db_user=$db_name
 db_pwd=$(ynh_app_setting_get --app=$app --key=psqlpwd)
 secretkey=$(ynh_app_setting_get --app=$app --key=secretkey)
 timezone="$(cat /etc/timezone)"