diff --git a/python-egenix-mx-base.spec b/python-egenix-mx-base.spec
index 1122662..7a857c3 100644
--- a/python-egenix-mx-base.spec
+++ b/python-egenix-mx-base.spec
@@ -1,7 +1,7 @@
 Summary:  A collection of Python software tools
 Name: python-egenix-mx-base
 Version: 3.2.4
-Release: 1%{?dist}
+Release: 2%{?dist}
 URL: http://www.egenix.com/products/python/mxBase/
 Source0: http://downloads.egenix.com/python/egenix-mx-base-%{version}.tar.gz
 License: eGenix
@@ -11,7 +11,7 @@ BuildRequires: python2-devel >= 2.7
 
 # For name change from mx to python-mx
 Provides: mx = %{version}-%{release}
-Obsoletes: mx < 3.2.3-2
+Obsoletes: mx < %{version}-%{release}
 
 # Install to platform lib directory
 Patch1: mx-3.1.1-lib64.patch
@@ -115,6 +115,9 @@ find %{buildroot}%{python_sitearch}/mx/ -name \*.so -exec chmod 755 {} \;
 %doc docs/*
 
 %changelog
+* Thu Jan 10 2013 Nils Philippsen <nils@redhat.com> 3.2.4-2
+- ensure updated mx packages are obsoleted
+
 * Fri Aug 03 2012 Brian C. Lane <bcl@redhat.com> 3.2.4-1
 - Changed package name to python-egenix-mx-base (#726841)
 - cleaned up spec file