diff --git a/python-pyasn1.changes b/python-pyasn1.changes
index 924749e..c84de43 100644
--- a/python-pyasn1.changes
+++ b/python-pyasn1.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Wed Apr 18 07:46:46 UTC 2012 - saschpe@suse.de
+
+- Fix obsoletes for python-asn1 instead
+
 -------------------------------------------------------------------
 Tue Apr 17 15:12:23 UTC 2012 - dmueller@suse.com
 
diff --git a/python-pyasn1.spec b/python-pyasn1.spec
index f965cd1..c2a201f 100644
--- a/python-pyasn1.spec
+++ b/python-pyasn1.spec
@@ -19,21 +19,21 @@
 Name:           python-pyasn1
 Version:        0.1.2
 Release:        0
-Url:            http://pyasn1.sf.net/
 Summary:        ASN.1 types and codecs
 License:        BSD-3-Clause
 Group:          Development/Languages/Python
+Url:            http://pyasn1.sf.net/
 Source:         http://pypi.python.org/packages/source/p/pyasn1/pyasn1-%{version}.tar.gz
-BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 BuildRequires:  python-devel
 BuildRequires:  python-distribute
-%if 0%{?suse_version}
-%py_requires
-%if 0%{?suse_version} > 1110
+Provides:       python-asn1 = %{version}
+Obsoletes:      python-asn1 < 0.1.2
+BuildRoot:      %{_tmppath}/%{name}-%{version}-build
+%if 0%{?suse_version} && 0%{?suse_version} <= 1110
+%{!?python_sitelib: %global python_sitelib %(python -c "from distutils.sysconfig import get_python_lib; print get_python_lib()")}
+%else
 BuildArch:      noarch
 %endif
-%endif
-%{!?python_sitelib: %global python_sitelib %(%{__python} -c "from distutils.sysconfig import get_python_lib; print get_python_lib()")}
 
 %description
 This is an implementation of ASN.1 types and codecs in Python programming
@@ -45,15 +45,11 @@ specification.
 %setup -q -n pyasn1-%{version}
 
 %build
-export CFLAGS="%{optflags}"
 python setup.py build
 
 %install
 python setup.py install --prefix=%{_prefix} --root=%{buildroot}
 
-%clean
-rm -rf %{buildroot}
-
 %files
 %defattr(-,root,root,-)
 %doc CHANGES LICENSE README THANKS TODO doc