diff --git a/bison.changes b/bison.changes
index 97a12ed..633020e 100644
--- a/bison.changes
+++ b/bison.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Wed Dec 10 12:34:56 CET 2008 - olh@suse.de
+
+- use Obsoletes: -XXbit only for ppc64 to help solver during distupgrade
+  (bnc#437293)
+
 -------------------------------------------------------------------
 Thu Oct 30 12:34:56 CET 2008 - olh@suse.de
 
diff --git a/bison.spec b/bison.spec
index e2f9848..e7f1caf 100644
--- a/bison.spec
+++ b/bison.spec
@@ -28,13 +28,10 @@ AutoReqProv:    on
 %ifarch ppc64
 Obsoletes:      bison-64bit
 %endif
-%ifarch  %ix86 ppc
-Obsoletes:      bison-32bit
-%endif
 #
 Requires:       m4
 Version:        2.3
-Release:        126
+Release:        127
 Summary:        The GNU Parser Generator
 Url:            http://www.gnu.org/software/bison/bison.html
 Source:         bison-%{version}.tar.bz2
@@ -97,6 +94,9 @@ rm -rf $RPM_BUILD_ROOT
 %install_info_delete --info-dir=%{_infodir} %{_infodir}/%{name}.info.gz
 
 %changelog
+* Wed Dec 10 2008 olh@suse.de
+- use Obsoletes: -XXbit only for ppc64 to help solver during distupgrade
+  (bnc#437293)
 * Thu Oct 30 2008 olh@suse.de
 - obsolete old -XXbit packages (bnc#437293)
 * Thu Apr 10 2008 ro@suse.de