diff --git a/rubygem-hashdiff.spec b/rubygem-hashdiff.spec
new file mode 100644
index 0000000..680f34f
--- /dev/null
+++ b/rubygem-hashdiff.spec
@@ -0,0 +1,80 @@
+# Generated from hashdiff-0.3.2.gem by gem2rpm -*- rpm-spec -*-
+%global gem_name hashdiff
+
+Name: rubygem-%{gem_name}
+Version: 0.3.2
+Release: 1%{?dist}
+Summary: HashDiff is a diff lib to compute the smallest difference between two hashes
+Group: Development/Languages
+License: MIT
+URL: https://github.com/liufengyun/hashdiff
+Source0: https://rubygems.org/gems/%{gem_name}-%{version}.gem
+BuildRequires: ruby(release)
+BuildRequires: rubygems-devel
+BuildRequires: ruby >= 1.8.7
+BuildRequires: rubygem(rspec)
+BuildArch: noarch
+
+%description
+HashDiff is a diff lib to compute the smallest difference between two hashes.
+
+
+%package doc
+Summary: Documentation for %{name}
+Group: Documentation
+Requires: %{name} = %{version}-%{release}
+BuildArch: noarch
+
+%description doc
+Documentation for %{name}.
+
+%prep
+gem unpack %{SOURCE0}
+
+%setup -q -D -T -n  %{gem_name}-%{version}
+
+gem spec %{SOURCE0} -l --ruby > %{gem_name}.gemspec
+
+%build
+# Create the gem as gem install only works on a gem file
+gem build %{gem_name}.gemspec
+
+# %%gem_install compiles any C extensions and installs the gem into ./%%gem_dir
+# by default, so that we can move it into the buildroot in %%install
+%gem_install
+
+%install
+mkdir -p %{buildroot}%{gem_dir}
+cp -a .%{gem_dir}/* \
+        %{buildroot}%{gem_dir}/
+
+
+
+
+# Run the test suite
+%check
+pushd .%{gem_instdir}
+rspec spec
+popd
+
+%files
+%dir %{gem_instdir}
+%exclude %{gem_instdir}/.*
+%license %{gem_instdir}/LICENSE
+# Exclude this file, since it is not the original one.
+%exclude %{gem_instdir}/hashdiff.gemspec
+%{gem_libdir}
+%exclude %{gem_cache}
+%{gem_spec}
+
+%files doc
+%doc %{gem_docdir}
+%{gem_instdir}/Gemfile
+%doc %{gem_instdir}/README.md
+%{gem_instdir}/Rakefile
+%doc %{gem_instdir}/changelog.md
+%{gem_instdir}/spec
+
+%changelog
+* Mon Feb 06 2017 Vít Ondruch <vondruch@redhat.com> - 0.3.2-1
+- Initial package