diff --git a/orchestrallily.ily b/orchestrallily.ily
index 68b953c76f91d8a85a3806810458ca763457fa23..5804d28b3dbe3d0163dc6014db6f1c5d06cd890d 100644
--- a/orchestrallily.ily
+++ b/orchestrallily.ily
@@ -392,7 +392,7 @@ orchestralVoiceTypes = #(define-music-function (parser location types) (list?)
 
     (if (ly:music? music)
       (begin
-        (set! musiccontent (make-simultaneous-music (append musiccontent (list music))))
+        (set! musiccontent (make-sequential-music (append musiccontent (list music))))
         ;(ly:message "Generating staff for ~a" name)
         (let* ((trpPitch (oly:extractTranspositionPitch piece name)))
           (if (ly:pitch? trpPitch)