diff --git a/libs/ardour/midi_diskstream.cc b/libs/ardour/midi_diskstream.cc
index b80f1978ad..04fcb126b9 100644
--- a/libs/ardour/midi_diskstream.cc
+++ b/libs/ardour/midi_diskstream.cc
@@ -624,15 +624,16 @@ MidiDiskstream::commit (framecnt_t playback_distance)
 	uint32_t frames_read = g_atomic_int_get(&_frames_read_from_ringbuffer);
 	uint32_t frames_written = g_atomic_int_get(&_frames_written_to_ringbuffer);
 
+	cerr << "MDS written: " << frames_written << " - read: " << frames_read <<
+		" = " << frames_written - frames_read
+	     << " + " << playback_distance << " < " << midi_readahead << " = " << need_butler << ")" << endl;
+		
 	assert (frames_read <= frames_written);
 
 	if ((frames_written - frames_read) + playback_distance < midi_readahead) {
 		need_butler = true;
 	}
 
-	/*cerr << "MDS written: " << frames_written << " - read: " << frames_read <<
-		" = " << frames_written - frames_read
-		<< " + " << nframes << " < " << midi_readahead << " = " << need_butler << ")" << endl;*/
 
 	return need_butler;
 }