diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 6d56840..d72d71e 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -2755,6 +2755,7 @@
 	return skb_shinfo(skb)->gso_size;
 }
 
+/* Note: Should be called only if skb_is_gso(skb) is true */
 static inline bool skb_is_gso_v6(const struct sk_buff *skb)
 {
 	return skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6;