--- a/src/node/i-ipv4.h	Fri May 11 10:11:06 2007 +0200
+++ b/src/node/i-ipv4.h	Fri May 11 18:42:39 2007 +0200
@@ -23,7 +23,7 @@
 
 #include <stdint.h>
 #include "ns3/ipv4-address.h"
-#include "ns3/ns-unknown.h"
+#include "ns3/interface.h"
 
 namespace ns3 {