Missing ' thanks Reinhold!

diff --git a/Documentation/user/programming-interface.itely b/Documentation/user/programming-interface.itely
index 2783c79a6a1956b7f478b1d51cbc32f33bf80f07..ac5e5ea0a4e5a99475688dd6b5dd70458490df26 100644 (file)
--- a/Documentation/user/programming-interface.itely
+++ b/Documentation/user/programming-interface.itely
@@ -263,7 +263,7 @@ without arguments,
 @example
 displayBarNum =
 #(define-music-function (parser location) ()
-   (if (eq? #t (ly:get-option display-bar-numbers))
+   (if (eq? #t (ly:get-option 'display-bar-numbers))
        #@{ \once \override Score.BarNumber #'break-visibility = ##f #@}
        #@{#@}))
 @end example