1 files changed, 7 insertions, 0 deletions

diff --git a/lisp/play/mpuz.el b/lisp/play/mpuz.el
index 28811924470..4cdb252be0c 100644
--- a/lisp/play/mpuz.el
+++ b/lisp/play/mpuz.el
@@ -22,6 +22,13 @@
 ;; file named COPYING.  Among other things, the copyright notice
 ;; and this notice must be preserved on all copies.
 
+;;; Commentary:
+
+;; When this package is loaded, `M-x mpuz' generates a random multiplication
+;; puzzle.  This is a multiplication example in which each digit has been
+;; consistently replaced with some letter.  Your job is to reconstruct
+;; the original digits.  Type `?' while the mode is active for detailed help.
+
 ;;; Code:
 
 (random t)                              ; randomize