diff --git a/gst/rtpdtmf/gstrtpdtmfsrc.c b/gst/rtpdtmf/gstrtpdtmfsrc.c
index a3e3d9a477..b6b53ad109 100644
--- a/gst/rtpdtmf/gstrtpdtmfsrc.c
+++ b/gst/rtpdtmf/gstrtpdtmfsrc.c
@@ -4,6 +4,8 @@
  *
  * Copyright (C) <2007> Nokia Corporation.
  *   Contact: Zeeshan Ali <zeeshan.ali@nokia.com>
+ * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
+ *               2000,2005 Wim Taymans <wim@fluendo.com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
diff --git a/gst/rtpdtmf/gstrtpdtmfsrc.h b/gst/rtpdtmf/gstrtpdtmfsrc.h
index e8a0e85095..6d012f429d 100644
--- a/gst/rtpdtmf/gstrtpdtmfsrc.h
+++ b/gst/rtpdtmf/gstrtpdtmfsrc.h
@@ -4,6 +4,7 @@
  *
  * Copyright (C) <2007> Nokia Corporation.
  *   Contact: Zeeshan Ali <zeeshan.ali@nokia.com>
+ * Copyright (C) <2005> Wim Taymans <wim@fluendo.com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public