--- a/src/core/callback.h	Sun Mar 16 20:47:46 2008 +0100
+++ b/src/core/callback.h	Sun Mar 16 20:55:18 2008 +0100
@@ -26,7 +26,6 @@
 #include "fatal-error.h"
 #include "empty.h"
 #include "type-traits.h"
-#include "object-base.h"
 
 namespace ns3 {