diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 583765a330fff6819b0634121dac043a1b414982..392fc8ac4c6ae6f52fab4f1d99bb3660a07cc6e6 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2238,6 +2238,7 @@ static void addrconf_add_mroute(struct net_device *dev)
 		.fc_dst_len = 8,
 		.fc_flags = RTF_UP,
 		.fc_nlinfo.nl_net = dev_net(dev),
+		.fc_protocol = RTPROT_KERNEL,
 	};
 
 	ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);