Patch by: Dmitry Vorotilin <d.vorotilin@gmail.com> (@route)
Signed-off-by: Akira Matsuda <ronnie@dio.jp>

closes #1475

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56681 b2dd03c8-39d4-4d8f-98ff-823fe69b080e