diff --git a/ChangeLog b/ChangeLog
index a90bf08e56..e39436a886 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -29,6 +29,8 @@ Wed May 15 17:55:49 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 	* configure.in (RUBY_PLATFORM): move to config.h as needed by
 	  version.c.
 
+Wed May 15 17:04:11 2013  Koichi Sasada  <ko1@atdot.net>
+
 	* gc.c: add an additional RGENGC_PROFILE mode (2).
 	  Profiling result can be check by GC.stat.