diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index c84a5a1..c413c58 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1325,6 +1325,16 @@
 	return dataref != 1;
 }
 
+static inline int skb_header_unclone(struct sk_buff *skb, gfp_t pri)
+{
+	might_sleep_if(gfpflags_allow_blocking(pri));
+
+	if (skb_header_cloned(skb))
+		return pskb_expand_head(skb, 0, 0, pri);
+
+	return 0;
+}
+
 /**
  *	skb_header_release - release reference to header
  *	@skb: buffer to operate on
diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c
index 786fa7c..9118b0e 100644
--- a/net/ipv4/ip_tunnel_core.c
+++ b/net/ipv4/ip_tunnel_core.c
@@ -157,7 +157,7 @@
 	}
 
 	if (skb_is_gso(skb)) {
-		err = skb_unclone(skb, GFP_ATOMIC);
+		err = skb_header_unclone(skb, GFP_ATOMIC);
 		if (unlikely(err))
 			return err;
 		skb_shinfo(skb)->gso_type |= gso_type_mask;