--- a/src/devices/wifi/dcf-manager.h	Mon Jun 08 13:44:51 2009 +0200
+++ b/src/devices/wifi/dcf-manager.h	Mon Jun 08 13:47:04 2009 +0200
@@ -1,4 +1,25 @@
 /* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2005,2006 INRIA
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
+ */
+
+#ifndef DCF_MANAGER_H
+#define DCF_MANAGER_H
 
 #include "ns3/nstime.h"
 #include "ns3/event-id.h"
@@ -289,3 +310,5 @@
 };
 
 } // namespace ns3
+
+#endif /* DCF_MANAGER_H */