diff --git a/include/uapi/linux/in6.h b/include/uapi/linux/in6.h
index 2bb132a9..d016ac9f 100644
--- a/include/uapi/linux/in6.h
+++ b/include/uapi/linux/in6.h
@@ -178,6 +178,7 @@ struct in6_flowlabel_req {
 #define IPV6_JOIN_ANYCAST	27
 #define IPV6_LEAVE_ANYCAST	28
 #define IPV6_MULTICAST_ALL	29
+#define IPV6_ROUTER_ALERT_ISOLATE	30
 
 /* IPV6_MTU_DISCOVER values */
 #define IPV6_PMTUDISC_DONT		0