diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 02529fc..1cf0cfa 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -2690,6 +2690,8 @@
 	return ktime_set(0, 0);
 }
 
+struct sk_buff *skb_clone_sk(struct sk_buff *skb);
+
 #ifdef CONFIG_NETWORK_PHY_TIMESTAMPING
 
 void skb_clone_tx_timestamp(struct sk_buff *skb);