diff --git a/include/net/ndisc.h b/include/net/ndisc.h
index 6f9c25a76cd1328856293c1af4d9cf8b10188c1c..c02b6ad3f6c589359a9de57f48fa38d683010349 100644
--- a/include/net/ndisc.h
+++ b/include/net/ndisc.h
@@ -34,6 +34,7 @@ enum {
 	__ND_OPT_ARRAY_MAX,
 	ND_OPT_ROUTE_INFO = 24,		/* RFC4191 */
 	ND_OPT_RDNSS = 25,		/* RFC5006 */
+	ND_OPT_DNSSL = 31,		/* RFC6106 */
 	__ND_OPT_MAX
 };
 
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 1d6fb0c94da1bf352e178dfcd97e8b5447a7c87d..7cb236e8e261e0620070273fabaa2a1673b043a0 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -15,6 +15,7 @@
 /*
  *	Changes:
  *
+ *	Alexey I. Froloff		:	RFC6106 (DNSSL) support
  *	Pierre Ynard			:	export userland ND options
  *						through netlink (RDNSS support)
  *	Lars Fenneberg			:	fixed MTU setting on receipt
@@ -228,7 +229,8 @@ static struct nd_opt_hdr *ndisc_next_option(struct nd_opt_hdr *cur,
 
 static inline int ndisc_is_useropt(struct nd_opt_hdr *opt)
 {
-	return opt->nd_opt_type == ND_OPT_RDNSS;
+	return opt->nd_opt_type == ND_OPT_RDNSS ||
+		opt->nd_opt_type == ND_OPT_DNSSL;
 }
 
 static struct nd_opt_hdr *ndisc_next_useropt(struct nd_opt_hdr *cur,