--- a/samples/main-ns2-mob.cc	Mon Oct 27 12:17:38 2008 +0100
+++ b/samples/main-ns2-mob.cc	Mon Oct 27 12:47:33 2008 +0100
@@ -4,6 +4,7 @@
 #include "ns3/helper-module.h"
 #include "ns3/mobility-module.h"
 #include <iostream>
+#include <fstream>
 
 using namespace ns3;