diff --git a/setup.py b/setup.py
index fce9670..6505ea8 100644
--- a/setup.py
+++ b/setup.py
@@ -1,7 +1,8 @@
-""" Tryton module to add xrechnung-export to invoice
-"""
+# -*- coding: utf-8 -*-
+# This file is part of the account-invoice-xrechnung-module
+# from m-ds for Tryton. The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
 
-# Always prefer setuptools over distutils
 from setuptools import setup
 # To use a consistent encoding
 from codecs import open