diff --git a/libs/midi++2/midi++/jackcompat.h b/libs/midi++2/midi++/jackcompat.h
index bf179f7333..f1b748ea66 100644
--- a/libs/midi++2/midi++/jackcompat.h
+++ b/libs/midi++2/midi++/jackcompat.h
@@ -18,7 +18,7 @@
 #ifndef JACK_COMPAT_H
 #define JACK_COMPAT_H
 
-//#define JACK_MIDI_NEEDS_NFRAMES
+#define JACK_MIDI_NEEDS_NFRAMES
 
 #if defined(JACK_MIDI_NEEDS_NFRAMES)