diff --git a/emacs/notmuch-mua.el b/emacs/notmuch-mua.el
index c07b67ba..4be7c13d 100644
--- a/emacs/notmuch-mua.el
+++ b/emacs/notmuch-mua.el
@@ -121,7 +121,7 @@ list."
   ;; properly quote them in the reply.  Note that using `point-max'
   ;; instead of `mark' here is wrong.  The buffer may include user's
   ;; signature which should not be MML-quoted.
-  (mml-quote-region (point) (point-max)))
+  (mml-quote-region (point) (mark)))
 
 (defun notmuch-mua-forward-message ()
   (message-forward)