diff --git a/ChangeLog b/ChangeLog
index c2e5a159cf..34ef80a37c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Oct 16 15:14:21 2013  Koichi Sasada  <ko1@atdot.net>
+
+	* NEWS: add a line into NEWS for last commit.
+
 Wed Oct 16 15:09:14 2013  Koichi Sasada  <ko1@atdot.net>
 
 	* ext/objspace/objspace.c: add a new method `reachable_objects_from_root'.
diff --git a/NEWS b/NEWS
index 59f6a34457..078c57c7c9 100644
--- a/NEWS
+++ b/NEWS
@@ -269,6 +269,7 @@ with all sufficient information, see the ChangeLog file.
     * ObjectSpace.allocation_class_path
     * ObjectSpace.allocation_method_id
     * ObjectSpace.allocation_generation
+    * ObjectSpace.reachable_objects_from_root
 
 * Set
   * incompatible changes: