diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index f6a5d8c73af9..186e60c79214 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -1209,6 +1209,9 @@ static void ndisc_ra_useropt(struct sk_buff *ra, struct nd_opt_hdr *opt)
 	ndmsg->nduseropt_icmp_type = icmp6h->icmp6_type;
 	ndmsg->nduseropt_icmp_code = icmp6h->icmp6_code;
 	ndmsg->nduseropt_opts_len = opt->nd_opt_len << 3;
+	ndmsg->nduseropt_pad1 = 0;
+	ndmsg->nduseropt_pad2 = 0;
+	ndmsg->nduseropt_pad3 = 0;
 
 	memcpy(ndmsg + 1, opt, opt->nd_opt_len << 3);