diff --git a/eo/test/mpi/gen-xp.py b/eo/test/mpi/gen-xp.py
index d9b8242b2..274e02436 100644
--- a/eo/test/mpi/gen-xp.py
+++ b/eo/test/mpi/gen-xp.py
@@ -1,4 +1,22 @@
 # -*- coding:utf-8 -*-
+"""
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+Authors:
+    Benjamin Bouvier <benjamin.bouvier@gmail.com>
+"""
 import json
 
 # Where will be saved the experiments?