diff --git a/drivers/net/sunhme.c b/drivers/net/sunhme.c
index 9d7cd13..ec432ea 100644
--- a/drivers/net/sunhme.c
+++ b/drivers/net/sunhme.c
@@ -2272,7 +2272,7 @@
 		u32 csum_start_off, csum_stuff_off;
 
 		csum_start_off = (u32) (skb->h.raw - skb->data);
-		csum_stuff_off = (u32) ((skb->h.raw + skb->csum) - skb->data);
+		csum_stuff_off = csum_start_off + skb->csum_offset;
 
 		tx_flags = (TXFLAG_OWN | TXFLAG_CSENABLE |
 			    ((csum_start_off << 14) & TXFLAG_CSBUFBEGIN) |