diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 1fcaa88..7c71790 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -337,6 +337,7 @@
 	/* Interface address info. */
 	unsigned char		broadcast[MAX_ADDR_LEN];	/* hw bcast add	*/
 	unsigned char		dev_addr[MAX_ADDR_LEN];	/* hw address	*/
+	unsigned char		perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
 	unsigned char		addr_len;	/* hardware address length	*/
 	unsigned short          dev_id;		/* for shared network cards */