diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 5c15bfb1f4d..933c44580e6 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,7 @@
+2008-12-23  Daiki Ueno  <ueno@unixuser.org>
+
+	* pgg.el: Add obsolescence info.
+
 2008-12-22  Richard M Stallman  <rms@gnu.org>
 
 	* shadowfile.el (shadow-copy-file): Handle buffer-swapped-with.
diff --git a/lisp/pgg.el b/lisp/pgg.el
index 33bbace71f4..cdf3269fcf4 100644
--- a/lisp/pgg.el
+++ b/lisp/pgg.el
@@ -25,6 +25,9 @@
 
 ;;; Commentary:
 
+;; This file is on its way to obsolescence, waiting for allout.el to
+;; switch to EPG.
+
 ;;; Code:
 
 (require 'pgg-def)