diff --git a/examples/sprint-topology.cc b/examples/sprint-topology.cc
index 526858b..2c58bfe 100644
--- a/examples/sprint-topology.cc
+++ b/examples/sprint-topology.cc
@@ -38,49 +38,49 @@
 int 
 main (int argc, char *argv[])
 {
-    Packet::EnableChecking();
-    Packet::EnablePrinting();
-    std::string input ("./src/NDNabstraction/examples/sprint.weights");
+  Packet::EnableChecking();
+  Packet::EnablePrinting();
+  std::string input ("./src/NDNabstraction/examples/sprint.weights");
     
-    // ------------------------------------------------------------
-    // -- Read topology data.
-    // --------------------------------------------
+  // ------------------------------------------------------------
+  // -- Read topology data.
+  // --------------------------------------------
     
-    Ptr<RocketfuelWeightsReader> reader = CreateObject<RocketfuelWeightsReader> ();
-    reader->SetFileName (input);
+  Ptr<RocketfuelWeightsReader> reader = CreateObject<RocketfuelWeightsReader> ();
+  reader->SetFileName (input);
     
-    NodeContainer nodes;
-    if (reader != 0)
+  NodeContainer nodes;
+  if (reader != 0)
     {
-        nodes = reader->Read ();
+      nodes = reader->Read ();
     }
     
-    if (reader->LinksSize () == 0)
+  if (reader->LinksSize () == 0)
     {
-        NS_LOG_ERROR ("Problems reading the topology file. Failing.");
-        return -1;
+      NS_LOG_ERROR ("Problems reading the topology file. Failing.");
+      return -1;
     }
     
-    NS_LOG_INFO("Nodes = " << nodes.GetN());
-    NS_LOG_INFO("Links = " << reader->LinksSize ());
+  NS_LOG_INFO("Nodes = " << nodes.GetN());
+  NS_LOG_INFO("Links = " << reader->LinksSize ());
     
-    int totlinks = reader->LinksSize ();
-    ///*** applying settings
-    NS_LOG_INFO ("creating node containers");
-    NodeContainer* nc = new NodeContainer[totlinks];
-    TopologyReader::ConstLinksIterator iter;
-    int i = 0;
-    for ( iter = reader->LinksBegin (); iter != reader->LinksEnd (); iter++, i++ )
+  int totlinks = reader->LinksSize ();
+  ///*** applying settings
+  NS_LOG_INFO ("creating node containers");
+  NodeContainer* nc = new NodeContainer[totlinks];
+  TopologyReader::ConstLinksIterator iter;
+  int i = 0;
+  for ( iter = reader->LinksBegin (); iter != reader->LinksEnd (); iter++, i++ )
     {
-        nc[i] = NodeContainer (iter->GetFromNode (), iter->GetToNode ());
+      nc[i] = NodeContainer (iter->GetFromNode (), iter->GetToNode ());
     }
     
-    NetDeviceContainer* ndc = new NetDeviceContainer[totlinks];
-    reader->ApplySettings(ndc,nc);
+  NetDeviceContainer* ndc = new NetDeviceContainer[totlinks];
+  reader->ApplySettings(ndc,nc);
     
-    NS_LOG_INFO ("Run Simulation.");
-    Simulator::Run ();
-    Simulator::Destroy ();
-    NS_LOG_INFO ("Done.");
-    return 0;
+  NS_LOG_INFO ("Run Simulation.");
+  Simulator::Run ();
+  Simulator::Destroy ();
+  NS_LOG_INFO ("Done.");
+  return 0;
 }