diff --git a/lisp/org/ob-lilypond.el b/lisp/org/ob-lilypond.el
index 15538b50374..dd204d7f6b1 100644
--- a/lisp/org/ob-lilypond.el
+++ b/lisp/org/ob-lilypond.el
@@ -36,6 +36,7 @@
 
 (declare-function org-show-all "org" (&optional types))
 
+;; FIXME: Doesn't this rather belong in lilypond-mode.el?
 (defalias 'lilypond-mode 'LilyPond-mode)
 
 (add-to-list 'org-babel-tangle-lang-exts '("LilyPond" . "ly"))