diff -rup net6-1.3.0rc2/src/socket.cpp net6-1.2.0.hacked/src/socket.cpp
--- net6-1.3.0rc2/src/socket.cpp 2005-11-13 12:32:39.000000000 -0500
+++ net6-1.3.0rc2.hacked/src/socket.cpp 2005-11-17 10:55:21.100049000 -0500
@@ -18,6 +18,7 @@
#include "config.hpp"
+#include <unistd.h>
#include "error.hpp"
#include "socket.hpp"