diff --git a/lisp/ob-lilypond.el b/lisp/ob-lilypond.el
index 1f817ad..a8ce65e 100644
--- a/lisp/ob-lilypond.el
+++ b/lisp/ob-lilypond.el
@@ -155,6 +155,7 @@ specific arguments to =org-babel-tangle="
       "-dno-gs-load-fonts "
       "-dinclude-eps-fonts "
       "--png "
+      "--pdf "
       "--output="
       (file-name-sans-extension out-file)
       " "