diff --git a/ChangeLog b/ChangeLog
index 76ccbc2bee..9008bb26b5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Nov  1 22:27:11 2012  Koichi Sasada <ko1@atdot.net>
+
+	* NEWS: add a news about objspace,
+	  ObjectSpace.reachable_objects_from.
+
 Thu Nov  1 21:57:00 2012  Kenta Murata  <mrkn@mrkn.jp>
 
 	* ext/bigdecimal/bigdecimal.c (BigDecimal_new),
diff --git a/NEWS b/NEWS
index b63776f388..e9124a013c 100644
--- a/NEWS
+++ b/NEWS
@@ -212,6 +212,10 @@ with all sufficient information, see the ChangeLog file.
   * Syck has been removed.  YAML now completely depends on libyaml being
     installed.
 
+* objspace
+  * new method:
+    * ObjectSpace.reachable_objects_from(obj)
+
 === Language changes
 
   * Added %i and %I for symbol list creation (similar to %w and %W).