diff --git a/ChangeLog b/ChangeLog
index 17b7d23b1e..d2f1b3bcf8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Nov 22 06:59:21 2011  Tanaka Akira  <akr@fsij.org>
+
+	* test/ruby/test_io.rb (test_fcntl_dupfd): there is no known platform
+	  which don't have F_DUPFD.  [ruby-dev:44874]
+
 Tue Nov 22 04:46:22 2011  Aaron Patterson <aaron@tenderlovemaking.com>
 
 	* ext/psych/lib/psych.rb: remove autoload from psych
diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index 7623053c79..f1fc3233b6 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -1927,7 +1927,7 @@ End
         IO.for_fd(fd).close
       end
     end
-  end if defined?(Fcntl::F_DUPFD)
+  end
 
   def test_cross_thread_close_fd
     skip "cross thread close causes hung-up if pipe." if /mswin|bccwin|mingw/ =~ RUBY_PLATFORM