diff --git a/python-et_xmlfile.changes b/python-et_xmlfile.changes
index fde713e..babfb2e 100644
--- a/python-et_xmlfile.changes
+++ b/python-et_xmlfile.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Wed Jul 26 08:56:00 UTC 2017 - bruno@ioda-net.ch
+
+- specfile : add line to define python-modules (fix build on Leap)
+
 -------------------------------------------------------------------
 Wed Jun  7 12:56:15 UTC 2017 - bruno@ioda-net.ch
 
diff --git a/python-et_xmlfile.spec b/python-et_xmlfile.spec
index 3d68cf5..95764e9 100644
--- a/python-et_xmlfile.spec
+++ b/python-et_xmlfile.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package python-et_xmlfile
 #
-# Copyright (c) 2017 SUSE LINUX Products GmbH, Nuernberg, Germany.
+# Copyright (c) 2017 SUSE LINUX GmbH, Nuernberg, Germany.
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -15,6 +15,8 @@
 # Please submit bugfixes or comments via http://bugs.opensuse.org/
 #
 
+
+%{?!python_module:%define python_module() python-%{**} python3-%{**}}
 Name:           python-et_xmlfile
 Version:        1.0.1
 Release:        0
@@ -24,13 +26,13 @@ Group:          Development/Languages/Python
 Url:            https://pypi.python.org/pypi/et_xmlfile
 Source0:        https://files.pythonhosted.org/packages/source/e/et_xmlfile/et_xmlfile-%{version}.tar.gz
 Source1:        https://bitbucket.org/openpyxl/et_xmlfile/raw/8c7ad6904ebe0ff98c204a3e77d7e78528b10ffe/LICENCE.rst
+BuildRequires:  %{python_module base}
+BuildRequires:  %{python_module devel}
+BuildRequires:  %{python_module lxml}
+BuildRequires:  %{python_module pytest}
+BuildRequires:  %{python_module setuptools}
 BuildRequires:  fdupes
 BuildRequires:  python-rpm-macros
-BuildRequires: %{python_module base}
-BuildRequires: %{python_module devel}
-BuildRequires: %{python_module lxml}
-BuildRequires: %{python_module pytest}
-BuildRequires: %{python_module setuptools}
 Requires:       python-jdcal
 Requires:       python-lxml >= 3.4
 BuildArch:      noarch
@@ -76,5 +78,4 @@ cp -a %{S:1} .
 %{python_sitelib}/et_xmlfile-%{version}-py%{py_ver}.egg-info
 %{python_sitelib}/et_xmlfile/
 
-
 %changelog