diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index 0ef1848..842abd9 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -1350,7 +1350,7 @@
 		u32 tcpsum;
 
 		tcpsum = offset << 16;		/* sum start */
-		tcpsum |= offset + skb->csum;	/* sum write */
+		tcpsum |= offset + skb->csum_offset;	/* sum write */
 
 		ctrl = CALSUM | WR_SUM | INIT_SUM | LOCK_SUM;
 		if (skb->nh.iph->protocol == IPPROTO_UDP)