diff --git a/lib/netdev.h b/lib/netdev.h
index 5dab27f..1bce814 100644
--- a/lib/netdev.h
+++ b/lib/netdev.h
@@ -67,6 +67,8 @@
 
 extern int netdev_addroute4(struct in_addr *dst, struct in_addr *gateway, struct in_addr *mask);
 extern int netdev_delroute4(struct in_addr *dst, struct in_addr *gateway, struct in_addr *mask);
+extern int netdev_addroute6(struct in6_addr *dst, struct in6_addr *gateway, int prefixlen, const char *gw_iface);
+extern int netdev_delroute6(struct in6_addr *dst, struct in6_addr *gateway, int prefixlen, const char *gw_iface);
 
 extern int netdev_ip_local_get(const char *devname, struct in46_prefix *prefix_list,
 				size_t prefix_size, int flags);