--- tftp_def.h.orig	2004-02-13 11:16:09.000000000 +0800
+++ tftp_def.h	2010-10-05 12:36:29.000000000 +0800
@@ -19,6 +19,7 @@
 
 #include <sys/time.h>
 #include <sys/times.h>
+#include <netinet/in.h>
 #include <netdb.h>
 
 /* standard return value */