diff --git a/libs/midi++2/ipmidi_port.cc b/libs/midi++2/ipmidi_port.cc
index 0ef0a9952a..0e7e610283 100644
--- a/libs/midi++2/ipmidi_port.cc
+++ b/libs/midi++2/ipmidi_port.cc
@@ -1,5 +1,7 @@
 /*
     Copyright (C) 2012 Paul Davie
+
+    Using code from Rui Nuno Capela's qmidinet as inspiration.
     
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by