diff -ur linux-2.4-bk-pomng/net/ipv4/netfilter/ipt_ROUTE.c linux-2.4-bk-pomng-ipt_route/net/ipv4/netfilter/ipt_ROUTE.c
--- linux-2.4-bk-pomng/net/ipv4/netfilter/ipt_ROUTE.c	Sat May 29 21:30:52 2004
+++ linux-2.4-bk-pomng-ipt_route/net/ipv4/netfilter/ipt_ROUTE.c	Sat May 29 21:33:58 2004
@@ -19,6 +19,7 @@
 #include <net/ip.h>
 #include <net/route.h>
 #include <net/icmp.h>
+#include <net/checksum.h>
 
 #if 0
 #define DEBUGP printk