diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index f2f820c..9ea9921 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -173,6 +173,7 @@
 		skb = ip_check_defrag(skb, IP_DEFRAG_MACVLAN);
 		if (!skb)
 			return RX_HANDLER_CONSUMED;
+		eth = eth_hdr(skb);
 		src = macvlan_hash_lookup(port, eth->h_source);
 		if (!src)
 			/* frame comes from an external address */