diff --git a/ChangeLog b/ChangeLog
index 21d5457ac3..291a1bbe05 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Mon Jul 26 14:08:47 2010  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* include/ruby/missing.h: revert a part of r28727.  config.h is expected
+	  to include only once, before including defines.h.
+	  including it here breaks some macro definitions.
+
 Mon Jul 26 13:52:25 2010  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* configure.in: define BROKEN_CLOSE only on FreeBSD.
diff --git a/include/ruby/missing.h b/include/ruby/missing.h
index 8e4ffae72a..6d5ace5ed0 100644
--- a/include/ruby/missing.h
+++ b/include/ruby/missing.h
@@ -18,8 +18,6 @@ extern "C" {
 #endif
 #endif
 
-#include "ruby/config.h"
-
 #if defined(HAVE_SYS_TIME_H)
 #  include <sys/time.h>
 #elif !defined(_WIN32)