diff --git a/doc/emacs/ChangeLog b/doc/emacs/ChangeLog
index 5fba9eda3b0..d87493d57b3 100644
--- a/doc/emacs/ChangeLog
+++ b/doc/emacs/ChangeLog
@@ -1,3 +1,7 @@
+2011-09-15  Chong Yidong  <cyd@stupidchicken.com>
+
+	* package.texi (Package Menu): Add package-menu-mark-upgrades.
+
 2011-09-12  Eric Hanchrow  <eric.hanchrow@gmail.com>
 
 	* frames.texi (Frame Commands): Note that delete-other-frames only
diff --git a/doc/emacs/package.texi b/doc/emacs/package.texi
index 739a8ce6c65..b342cbbf18c 100644
--- a/doc/emacs/package.texi
+++ b/doc/emacs/package.texi
@@ -107,6 +107,12 @@ entails.
 Remove any installation or deletion mark previously added to the
 current line by an @kbd{i} or @kbd{d} command.
 
+@item U
+Mark all package with a newer available version for ``upgrading''
+(@code{package-menu-mark-upgrades}).  This places an installation mark
+on the new available versions, and a deletion mark on the old
+installed versions.
+
 @item x
 Download and install all packages marked with @kbd{i}, and their
 dependencies; also, delete all packages marked with @kbd{d}