diff --git a/include/net/addrconf.h b/include/net/addrconf.h
index f3531d0..33b593e 100644
--- a/include/net/addrconf.h
+++ b/include/net/addrconf.h
@@ -61,7 +61,7 @@
 extern int			ipv6_chk_addr(struct in6_addr *addr,
 					      struct net_device *dev,
 					      int strict);
-#ifdef CONFIG_IPV6_MIP6
+#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 extern int			ipv6_chk_home_addr(struct in6_addr *addr);
 #endif
 extern struct inet6_ifaddr *	ipv6_get_ifaddr(struct in6_addr *addr,