diff --git a/bison.changes b/bison.changes
index 71a6861..d47b7c4 100644
--- a/bison.changes
+++ b/bison.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Tue Sep  1 14:24:58 UTC 2015 - tchvatal@suse.com
+
+- Set the installinfo in preun rather than postun to avoid ugly
+  warning about file not being present.
+- Remove the Obsolete for old ppc64 support that won't get triggered
+
 -------------------------------------------------------------------
 Fri Feb 20 21:14:39 UTC 2015 - mpluskal@suse.com
 
diff --git a/bison.spec b/bison.spec
index 1abaa81..390fa98 100644
--- a/bison.spec
+++ b/bison.spec
@@ -31,13 +31,10 @@ BuildRequires:  flex
 BuildRequires:  gcc-c++
 BuildRequires:  xz
 Requires:       m4
-Requires(pre):  %{install_info_prereq}
+Requires(post):  %{install_info_prereq}
+Requires(preun): %{install_info_prereq}
 Recommends:     %{name}-lang
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
-# bug437293
-%ifarch ppc64
-Obsoletes:      bison-64bit
-%endif
 
 %description
 Bison is a parser generator similar to yacc(1).
@@ -82,7 +79,7 @@ make DESTDIR=%{buildroot} install %{?_smp_mflags}
 %post
 %install_info --info-dir=%{_infodir} %{_infodir}/%{name}.info.gz
 
-%postun
+%preun
 %install_info_delete --info-dir=%{_infodir} %{_infodir}/%{name}.info.gz
 
 %changelog