diff --git a/scripts/change_url b/scripts/change_url
index 957d1d1..3c3015d 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -34,6 +34,7 @@ db_name=$(ynh_app_setting_get --app=$app --key=db_name)
 db_user=$db_name
 db_pwd=$(ynh_app_setting_get --app=$app --key=mysqlpwd)
 key=$(ynh_app_setting_get --app=$app --key=key)
+datadir=$(ynh_app_setting_get --app=$app --key=datadir)
 
 #=================================================
 # BACKUP BEFORE UPGRADE THEN ACTIVE TRAP