diff --git a/rubygem-pg.spec b/rubygem-pg.spec
index 9943a37..4a76ced 100644
--- a/rubygem-pg.spec
+++ b/rubygem-pg.spec
@@ -5,7 +5,7 @@
 Summary: A Ruby interface to the PostgreSQL RDBMS
 Name: rubygem-%{gem_name}
 Version: 0.12.2
-Release: 1%{?dist}
+Release: 2%{?dist}
 Group: Development/Languages
 # Upstream license clarification (https://bitbucket.org/ged/ruby-pg/issue/72/)
 #
@@ -25,6 +25,8 @@ BuildRequires: ruby
 BuildRequires: postgresql-server postgresql-devel
 # Keep requiring rspec-core as long as rubygem(rspec) is provided by RSpec 1.x
 BuildRequires: rubygem(rspec-core)
+# Introduced in F17.
+Obsoletes: ruby(postgres) <= 0.7.9-2010.01.28.2
 Provides: rubygem(%{gem_name}) = %{version}
 
 %description
@@ -108,6 +110,9 @@ popd
 
 
 %changelog
+* Tue Feb 07 2012 Vít Ondruch <vondruch@redhat.com> - 0.12.2-2
+- Obsolete ruby-postgress, which was retired.
+
 * Tue Jan 24 2012 Vít Ondruch <vondruch@redhat.com> - 0.12.2-1
 - Rebuilt for Ruby 1.9.3.
 - Upgrade to pg 0.12.2.