diff --git a/include/net/ipip.h b/include/net/ipip.h
index 84058858eea7..7cdc914322f0 100644
--- a/include/net/ipip.h
+++ b/include/net/ipip.h
@@ -44,8 +44,4 @@ struct ip_tunnel
 	}								\
 } while (0)
 
-
-extern int	sit_init(void);
-extern void	sit_cleanup(void);
-
 #endif
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 85ff3dc45148..77b7b0911438 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -809,7 +809,7 @@ static void __exit sit_destroy_tunnels(void)
 	}
 }
 
-void __exit sit_cleanup(void)
+static void __exit sit_cleanup(void)
 {
 	inet_del_protocol(&sit_protocol, IPPROTO_IPV6);
 
@@ -819,7 +819,7 @@ void __exit sit_cleanup(void)
 	rtnl_unlock();
 }
 
-int __init sit_init(void)
+static int __init sit_init(void)
 {
 	int err;