diff --git a/examples/ndn-simple-with-pcap.cc b/examples/ndn-simple-with-pcap.cc
index ea2f318..03f3ef4 100644
--- a/examples/ndn-simple-with-pcap.cc
+++ b/examples/ndn-simple-with-pcap.cc
@@ -1,4 +1,23 @@
-
+/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2012 University of California, Los Angeles
+ *
+ * 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: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ */
+// ndn-simple-with-pcap.cc
 #include "ns3/core-module.h"
 #include "ns3/network-module.h"
 #include "ns3/point-to-point-module.h"
@@ -14,13 +33,13 @@
     PcapHelper helper;
     m_pcap = helper.CreateFile (file, std::ios::out, PcapHelper::DLT_PPP);
   }
-  
+
   void
   TracePacket (Ptr<const Packet> packet)
   {
     static PppHeader pppHeader;
     pppHeader.SetProtocol (0x0077);
-    
+
     m_pcap->Write (Simulator::Now (), pppHeader, packet);
   }
 
@@ -37,8 +56,6 @@
   Config::SetDefault ("ns3::PointToPointChannel::Delay", StringValue ("10ms"));
   Config::SetDefault ("ns3::DropTailQueue::MaxPackets", StringValue ("20"));
 
-  Config::SetDefault ("ns3::ndn::Producer::SignatureBits", StringValue ("1"));
-  
   // Creating nodes
   NodeContainer nodes;
   nodes.Create (3);
@@ -72,7 +89,7 @@
   PcapWriter trace ("ndn-simple-trace.pcap");
   Config::ConnectWithoutContext ("/NodeList/*/$ns3::ndn::L3Protocol/FaceList/*/NdnTx",
 				 MakeCallback (&PcapWriter::TracePacket, &trace));
-  
+
   Simulator::Stop (Seconds (20.0));
 
   Simulator::Run ();