diff -ur ipvs-1.0.6/ipvs/ip_vs_conn.c ipvs-1.0.6-testonly/ipvs/ip_vs_conn.c
--- ipvs-1.0.6/ipvs/ip_vs_conn.c	2002-08-10 07:32:35.000000000 +0300
+++ ipvs-1.0.6-testonly/ipvs/ip_vs_conn.c	2002-09-16 15:59:14.000000000 +0300
@@ -628,8 +628,7 @@
 		goto tx_error;
 	}
 
-	if (skb_is_nonlinear(skb) && skb->len <= mtu)
-		ip_send_check(iph);
+	ip_send_check(iph);
 
 	if (unlikely(skb_headroom(skb) < rt->u.dst.dev->hard_header_len)) {
 		if (skb_cow(skb, rt->u.dst.dev->hard_header_len)) {
@@ -886,8 +885,7 @@
 		goto tx_error;
 	}
 
-	if (skb_is_nonlinear(skb))
-		ip_send_check(old_iph);
+	ip_send_check(old_iph);
 
 	skb->h.raw = skb->nh.raw;
 
@@ -975,8 +973,7 @@
 		goto tx_error;
 	}
 
-	if (skb_is_nonlinear(skb) && skb->len <= mtu)
-		ip_send_check(iph);
+	ip_send_check(iph);
 
 	if (unlikely(skb_headroom(skb) < rt->u.dst.dev->hard_header_len)) {
 		if (skb_cow(skb, rt->u.dst.dev->hard_header_len)) {
diff -ur ipvs-1.0.6/ipvs/ip_vs_core.c ipvs-1.0.6-testonly/ipvs/ip_vs_core.c
--- ipvs-1.0.6/ipvs/ip_vs_core.c	2002-08-10 07:32:35.000000000 +0300
+++ ipvs-1.0.6-testonly/ipvs/ip_vs_core.c	2002-09-16 15:54:03.000000000 +0300
@@ -511,12 +511,12 @@
 		if (!skb)
 			return NF_STOLEN;
 		*skb_p = skb;
+		ip_send_check(skb->nh.iph);
 	}
 
 	if (skb_is_nonlinear(skb)) {
 		if (skb_linearize(skb, GFP_ATOMIC) != 0)
 			return NF_DROP;
-		ip_send_check(skb->nh.iph);
 	}
 
 	iph = skb->nh.iph;
@@ -700,8 +700,7 @@
 			  ip_vs_proto_name(iph->protocol),
 			  NIPQUAD(iph->daddr),
 			  ntohs(h.portp[1]));
-		if (skb_is_nonlinear(skb))
-			ip_send_check(iph);
+		ip_send_check(iph);
 		return NF_ACCEPT;
 	}
 
@@ -863,10 +862,10 @@
 	if (skb_is_nonlinear(skb)) {
 		if (skb_linearize(skb, GFP_ATOMIC) != 0)
 			return NF_DROP;
-		ip_send_check(skb->nh.iph);
 	}
 
 	iph = skb->nh.iph;
+	ip_send_check(iph);
 	icmph = (struct icmphdr *)((char *)iph+(iph->ihl<<2));
 	len = ntohs(iph->tot_len) - (iph->ihl<<2);
 	if (len < sizeof(struct icmphdr))