diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 16b90a24c9ba..39bd8951bfca 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -1112,7 +1112,7 @@ static void ipip6_tunnel_bind_dev(struct net_device *dev)
 							  iph->daddr, iph->saddr,
 							  0, 0,
 							  IPPROTO_IPV6,
-							  RT_TOS(iph->tos),
+							  iph->tos & INET_DSCP_MASK,
 							  tunnel->parms.link);
 
 		if (!IS_ERR(rt)) {