diff --git a/include/net/if_arp.h b/include/net/if_arp.h
index 18d5dcf9..361ecfc9 100644
--- a/include/net/if_arp.h
+++ b/include/net/if_arp.h
@@ -91,6 +91,7 @@ struct arphdr {
 #define ARPHRD_CAIF 822
 #define ARPHRD_IP6GRE 823
 #define ARPHRD_NETLINK 824
+#define ARPHRD_6LOWPAN 825
 
 #define ARPHRD_VOID	  0xFFFF
 #define ARPHRD_NONE	  0xFFFE