diff --git a/gmp.changes b/gmp.changes
index a697cc2..21a04f0 100644
--- a/gmp.changes
+++ b/gmp.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Mon Nov 24 12:34:56 CET 2008 - olh@suse.de
+
+- obsolete old -XXbit packages (bnc#437293)
+
 -------------------------------------------------------------------
 Mon Aug  4 10:54:43 CEST 2008 - rguenther@suse.de
 
diff --git a/gmp.spec b/gmp.spec
index a880da7..6ed196f 100644
--- a/gmp.spec
+++ b/gmp.spec
@@ -23,8 +23,16 @@ BuildRequires:  gcc-c++
 License:        GPL v3 or later; LGPL v3 or later
 Group:          System/Libraries
 AutoReqProv:    on
+# bug437293
+%ifarch ppc64
+Obsoletes:      gmp-64bit
+%endif
+%ifarch  %ix86 ppc
+Obsoletes:      gmp-32bit
+%endif
+#
 Version:        4.2.3
-Release:        1
+Release:        9
 Summary:        The GNU MP Library
 Url:            http://gmplib.org/
 Source:         gmp-%{version}.tar.bz2
@@ -48,6 +56,14 @@ Summary:        Include Files and Libraries for Development with the GNU MP Libr
 Group:          Development/Languages/C and C++
 Requires:       gmp = %{version}
 AutoReqProv:    on
+# bug437293
+%ifarch ppc64
+Obsoletes:      gmp-devel-64bit
+%endif
+%ifarch  %ix86 ppc
+Obsoletes:      gmp-devel-32bit
+%endif
+#
 PreReq:         %install_info_prereq
 
 %description devel
@@ -140,6 +156,8 @@ rm -rf $RPM_BUILD_ROOT
 /usr/include/gmpxx.h
 
 %changelog
+* Mon Nov 24 2008 olh@suse.de
+- obsolete old -XXbit packages (bnc#437293)
 * Mon Aug 04 2008 rguenther@suse.de
 - Update to version 4.2.3.
   * minor bugfixes
@@ -187,7 +205,7 @@ rm -rf $RPM_BUILD_ROOT
 - update to 4.1.4
 * Thu Nov 18 2004 ro@suse.de
 - fixed file list
-* Mon Sep 06 2004 schwab@suse.de
+* Sun Sep 05 2004 schwab@suse.de
 - Use autoreconf.
 - Fix read-only section check.
 * Tue Aug 10 2004 tcrhak@suse.cz