diff --git a/net/ndisc.c b/net/ndisc.c
index 3c0eeea..367dae7 100644
--- a/net/ndisc.c
+++ b/net/ndisc.c
@@ -265,7 +265,7 @@
 
 			/* save address for later use */
 			if (!net_nd_packet_mac)
-				memcpy(net_nd_packet_mac, neigh_eth_addr, 7);
+				net_nd_packet_mac = neigh_eth_addr;
 
 			/* modify header, and transmit it */
 			memcpy(((struct ethernet_hdr *)net_nd_tx_packet)->et_dest,