diff -Nru linux-2.4.20/net/ipv4/netfilter/ipt_ECN.c linux-2.4.20-pom2patch/net/ipv4/netfilter/ipt_ECN.c
--- linux-2.4.20/net/ipv4/netfilter/ipt_ECN.c	2002-11-28 17:53:15.000000000 -0600
+++ linux-2.4.20-pom2patch/net/ipv4/netfilter/ipt_ECN.c	2003-05-02 12:59:29.000000000 -0500
@@ -87,8 +87,8 @@
 	}
 	
 	if (diffs[0] != *tcpflags) {
-		diffs[0] = htons(diffs[0]) ^ 0xFFFF;
-		diffs[1] = htons(*tcpflags);
+		diffs[0] = diffs[0] ^ 0xFFFF;
+		diffs[1] = *tcpflags;
 		tcph->check = csum_fold(csum_partial((char *)diffs,
 		                                    sizeof(diffs),
 		                                    tcph->check^0xFFFF));
