diff --git a/libs/ardour/midi_diskstream.cc b/libs/ardour/midi_diskstream.cc
index 03188113ef..79ef361e1f 100644
--- a/libs/ardour/midi_diskstream.cc
+++ b/libs/ardour/midi_diskstream.cc
@@ -455,7 +455,7 @@ 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 <<
+	cerr << name() << " MDS written: " << frames_written << " - read: " << frames_read <<
 		" = " << frames_written - frames_read
 	     << " + " << playback_distance << " < " << midi_readahead << " = " << need_butler << ")" << endl;