diff --git a/include/linux/ieee802154.h b/include/linux/ieee802154.h
index 4c032863cd714bf4498118d42203c27e863c8b34..a907fe59b1d12f6712a51b2f96e9eab1bc67919f 100644
--- a/include/linux/ieee802154.h
+++ b/include/linux/ieee802154.h
@@ -29,6 +29,8 @@
 #define IEEE802154_MTU			127
 #define IEEE802154_MIN_PSDU_LEN		5
 
+#define IEEE802154_EXTENDED_ADDR_LEN	8
+
 #define IEEE802154_FC_TYPE_BEACON	0x0	/* Frame is beacon */
 #define	IEEE802154_FC_TYPE_DATA		0x1	/* Frame is data */
 #define IEEE802154_FC_TYPE_ACK		0x2	/* Frame is acknowledgment */