; Add a note

diff --git a/lisp/progmodes/elisp-mode.el b/lisp/progmodes/elisp-mode.el
index fef01eca9dd7e8ea61a691f2104d6de8e4dc52a9..917a7ad9afd2d285e9935138712363dcc0c72c09 100644 (file)
--- a/lisp/progmodes/elisp-mode.el
+++ b/lisp/progmodes/elisp-mode.el
@@ -989,6 +989,8 @@ namespace but with lower confidence."
 
              ((setq generic (cl--generic symbol))
               ;; FIXME: move this to elisp-xref-find-def-functions, in cl-generic.el
+              ;; XXX: How are we going to support using newer xref
+              ;; with older versions of Emacs, though?
 
               ;; A generic function. If there is a default method, it
               ;; will appear in the method table, with no