diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 37247901ebd2ffe9f8c5fde0987210a565eacdd8..1c19b2d55c2b999463f500e1e5aed800538035d6 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1654,5 +1654,12 @@ static inline int skb_is_gso(const struct sk_buff *skb)
 	return skb_shinfo(skb)->gso_size;
 }
 
+static inline void skb_forward_csum(struct sk_buff *skb)
+{
+	/* Unfortunately we don't support this one.  Any brave souls? */
+	if (skb->ip_summed == CHECKSUM_COMPLETE)
+		skb->ip_summed = CHECKSUM_NONE;
+}
+
 #endif	/* __KERNEL__ */
 #endif	/* _LINUX_SKBUFF_H */
diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c
index 3e45c1a1aa96124f1bf525346aecf14b704f4311..ada7f495445c5ae24e1495df005c5411430a6f14 100644
--- a/net/bridge/br_forward.c
+++ b/net/bridge/br_forward.c
@@ -71,7 +71,7 @@ static void __br_forward(const struct net_bridge_port *to, struct sk_buff *skb)
 
 	indev = skb->dev;
 	skb->dev = to->dev;
-	skb->ip_summed = CHECKSUM_NONE;
+	skb_forward_csum(skb);
 
 	NF_HOOK(PF_BRIDGE, NF_BR_FORWARD, skb, indev, skb->dev,
 			br_forward_finish);
diff --git a/net/ipv4/ip_forward.c b/net/ipv4/ip_forward.c
index 61b30d10067644538bda2207a4637b019c2ebdbb..9cb04df0054b6417b44498dabc75f55b55355011 100644
--- a/net/ipv4/ip_forward.c
+++ b/net/ipv4/ip_forward.c
@@ -67,7 +67,7 @@ int ip_forward(struct sk_buff *skb)
 	if (skb->pkt_type != PACKET_HOST)
 		goto drop;
 
-	skb->ip_summed = CHECKSUM_NONE;
+	skb_forward_csum(skb);
 
 	/*
 	 *	According to the RFC, we must first decrease the TTL field. If
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index e2b8db6b9aef0f0319031ba1ff86052518cf66dc..be3f082a87ed410723edef3a938962c43274b1c4 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -378,7 +378,7 @@ int ip6_forward(struct sk_buff *skb)
 		goto drop;
 	}
 
-	skb->ip_summed = CHECKSUM_NONE;
+	skb_forward_csum(skb);
 
 	/*
 	 *	We DO NOT make any processing on