diff --git a/lib/tun.h b/lib/tun.h
index 50ac806..95fff26 100644
--- a/lib/tun.h
+++ b/lib/tun.h
@@ -85,4 +85,6 @@
 
 extern int tun_runscript(struct tun_t *tun, char *script);
 
+int tun_ipv6_linklocal_get(const struct tun_t *tun, struct in6_addr *ia);
+
 #endif /* !_TUN_H */