--- net/ipv4/netfilter/ipt_ECN.c.orig	2002-12-09 23:14:20.000000000 +0100
+++ net/ipv4/netfilter/ipt_ECN.c	2002-12-09 23:25:54.000000000 +0100
@@ -41,10 +41,10 @@
 			iph = (*pskb)->nh.iph;
 		}
 
-		diffs[0] = htons(iph->tos) ^ 0xFFFF;
+		diffs[0] = iph->tos ^ 0xFF;
 		iph->tos = iph->tos & ~IPT_ECN_IP_MASK;
 		iph->tos = iph->tos | (einfo->ip_ect & IPT_ECN_IP_MASK);
-		diffs[1] = htons(iph->tos);
+		diffs[1] = iph->tos;
 		iph->check = csum_fold(csum_partial((char *)diffs,
 		                                    sizeof(diffs),
 		                                    iph->check^0xFFFF));