diff --git a/include/linux/in6.h b/include/linux/in6.h
index 304aaed..086ec2a 100644
--- a/include/linux/in6.h
+++ b/include/linux/in6.h
@@ -142,6 +142,7 @@
 #define IPV6_TLV_PADN		1
 #define IPV6_TLV_ROUTERALERT	5
 #define IPV6_TLV_JUMBO		194
+#define IPV6_TLV_HAO		201	/* home address option */
 
 /*
  *	IPV6 socket options