diff --git a/scripts/install b/scripts/install
index 15d047d..09c4bcb 100644
--- a/scripts/install
+++ b/scripts/install
@@ -54,6 +54,7 @@ ynh_app_setting_set --app=$app --key=admin --value=$admin
 ynh_script_progression --message="Creating a MySQL database..."
 
 db_name=$(ynh_sanitize_dbid --db_name=$app)
+db_user=$db_name
 ynh_app_setting_set --app=$app --key=db_name --value=$db_name
 ynh_mysql_setup_db --db_user=$db_name --db_name=$db_name
 
diff --git a/scripts/upgrade b/scripts/upgrade
index f3e4d95..3b22eef 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -21,6 +21,7 @@ path_url=$(ynh_app_setting_get --app=$app --key=path)
 admin=$(ynh_app_setting_get --app=$app --key=admin)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 db_name=$(ynh_app_setting_get --app=$app --key=db_name)
+db_user=$db_name
 db_admin_user=$(ynh_app_setting_get --app=$app --key=db_admin_user)
 db_admin_pwd=$(ynh_app_setting_get --app=$app --key=db_admin_pwd)