diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 63dd1f89ed7de..ca1af0760c4cf 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -678,7 +678,6 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 	}
 	case MCAST_MSFILTER:
 	{
-		extern int sysctl_mld_max_msf;
 		struct group_filter *gsf;
 
 		if (optlen < GROUP_FILTER_SIZE(0))