diff --git a/ChangeLog b/ChangeLog
index 2fd71e479a..2cfdbda958 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Mar 20 22:16:25 2002  Usaku Nakamura <usa@ruby-lang.org>
+
+	* mkconfig.rb: close duplicated $stdout before renaming rbconfig.rb.
+
 Wed Mar 20 21:54:17 2002  Nobuyoshi Nakada  <nobu.nakada@nifty.ne.jp>
 
 	* win32/Makefile.sub: made variables configurable.
diff --git a/mkconfig.rb b/mkconfig.rb
index d558583b61..a2db2d21bc 100644
--- a/mkconfig.rb
+++ b/mkconfig.rb
@@ -9,6 +9,7 @@ File.makedirs(File.dirname(rbconfig_rb), true)
 version = RUBY_VERSION
 rbconfig_rb_tmp = rbconfig_rb + '.tmp'
 config = open(rbconfig_rb_tmp, "w")
+$orgout = $stdout.dup
 $stdout.reopen(config)
 
 fast = {'prefix'=>TRUE, 'ruby_install_name'=>TRUE, 'INSTALL'=>TRUE, 'EXEEXT'=>TRUE}
@@ -111,6 +112,8 @@ print <<EOS
   end
 end
 EOS
+$stdout.flush
+$stdout.reopen($orgout)
 config.close
 File.rename(rbconfig_rb_tmp, rbconfig_rb)