diff --git a/etc/NEWS b/etc/NEWS
index 7145b9eb09e..6ca36419116 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -1356,6 +1356,9 @@ behavior, customize the value of 'tooltip-delay' to zero.
 *** cdl.el is now obsolete.
 Use 'shell-command' and 'shell-command-on-region' instead.
 
+---
+*** echistory.el is now obsolete.
+
 ---
 *** hashcash.el is now obsolete.
 It is believed to no longer be useful as a method to fight spam.
diff --git a/etc/TODO b/etc/TODO
index 122a09063be..1900cd5b159 100644
--- a/etc/TODO
+++ b/etc/TODO
@@ -860,7 +860,7 @@ for completeness, but some may be worth documenting.
 
 Here's a list which is probably not complete/correct: align, allout,
 artist, ansi-color, array, calculator, cdl, cmuscheme, completion,
-delim-col, dirtrack, double, echistory, elide-head, easymenu, expand,
+delim-col, dirtrack, double, elide-head, easymenu, expand,
 flow-ctrl, format [format-alist], generic/generic-x [various modes],
 kermit, log-edit, makesum, midnight [other than in Kill Buffer node],
 mouse-copy [?], mouse-drag, mouse-sel, net-utils, snmp-mode
diff --git a/lisp/obsolete/echistory.el b/lisp/obsolete/echistory.el
index d7cc5d6a5a5..5b530781188 100644
--- a/lisp/obsolete/echistory.el
+++ b/lisp/obsolete/echistory.el
@@ -4,6 +4,7 @@
 
 ;; Author: K. Shane Hartman
 ;; Maintainer: emacs-devel@gnu.org
+;; Obsolete-since: 31.1
 
 ;; This file is part of GNU Emacs.