diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 4c4bec63..20ec0a64 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1355,6 +1355,11 @@
 }
 #endif /* NET_SKBUFF_DATA_USES_OFFSET */
 
+static inline int skb_checksum_start_offset(const struct sk_buff *skb)
+{
+	return skb->csum_start - skb_headroom(skb);
+}
+
 static inline int skb_transport_offset(const struct sk_buff *skb)
 {
 	return skb_transport_header(skb) - skb->data;