diff --git a/ChangeLog b/ChangeLog
index c4d663249c..de579ea151 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Dec 20 20:04:41 2010  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
+
+	* NEWS: add #__id__ and #object_id. [ruby-dev:42778]
+
 Mon Dec 20 20:03:21 2010  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
 
 	* thread_pthread.c (native_thread_destroy): Fixed gvl_cond leak.
diff --git a/NEWS b/NEWS
index 072a06eb62..19c1d85db4 100644
--- a/NEWS
+++ b/NEWS
@@ -27,8 +27,8 @@ with all sufficient information, see the ChangeLog file.
 * builtin classes
 
   * Kernel
-
     * Kernel#respond_to? now returns false for protected methods.
+    * move #__id__ and #object_id to BasicObject.
 
   * Encoding
     * new encodings: