diff --git a/gimp.spec b/gimp.spec
index 12a4b51..20302a4 100644
--- a/gimp.spec
+++ b/gimp.spec
@@ -36,6 +36,7 @@ Group:          Applications/Multimedia
 URL:            http://www.gimp.org/
 BuildRoot:      %{_tmppath}/%{name}-%{version}-root-%(%__id_u -n)
 Obsoletes:      gimp-perl < 2:2.0
+Obsoletes:      gimp < 2:2.6.0-3
 BuildRequires:  alsa-lib-devel >= 1.0.0
 BuildRequires:  babl-devel >= 0.0.22
 BuildRequires:  cairo-devel >= 1.4.10
@@ -138,6 +139,7 @@ extensions.
 Summary:        GIMP help browser plug-in
 Group:          Applications/Multimedia
 License:        GPLv2+
+Obsoletes:      gimp < 2:2.6.0-3
 Requires:       gimp-%{_arch} = %{?epoch:%{epoch}:}%{version}-%{release}
 
 %description help-browser
@@ -443,6 +445,8 @@ fi
 %changelog
 * Wed Oct 08 2008 Nils Philippsen <nils@redhat.com> - 2:2.6.0-3
 - split off help browser plugin
+- let gimp and gimp-help-browser obsolete older gimp versions to allow seamless
+  upgrades
 
 * Tue Oct 07 2008 Nils Philippsen <nils@redhat.com> - 2:2.6.0-2
 - move gimptool to devel subpackage