diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index b20ebccea89..03e0ba3ef89 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,8 @@
+2011-10-24  Michael Albinus  <michael.albinus@gmx.de>
+
+	* notifications.el: Add the requirement of a running D-Bus session
+	bus to the Commentary.
+
 2011-10-24  Juri Linkov  <juri@jurta.org>
 
 	* isearch.el (isearch-occur): Let-bind `search-spaces-regexp' to
diff --git a/lisp/notifications.el b/lisp/notifications.el
index 42cd40df36b..a4e7fdd5425 100644
--- a/lisp/notifications.el
+++ b/lisp/notifications.el
@@ -30,6 +30,9 @@
 ;;
 ;;   (require 'notifications)
 
+;; For proper usage, Emacs must be started in an environment with an
+;; active D-Bus session bus.
+
 ;;; Code:
 (eval-when-compile
   (require 'cl))