1 files changed, 2 insertions, 1 deletions

diff --git a/include/net/ndisc.h b/include/net/ndisc.h
index e0e594f8e9d9..6144685d601b 100644
--- a/include/net/ndisc.h
+++ b/include/net/ndisc.h
@@ -102,7 +102,8 @@ extern void			ndisc_send_redirect(struct sk_buff *skb,
                                                     struct neighbour *neigh,
                                                     const struct in6_addr *target);
 
-extern int                      ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir);
+extern int                      ndisc_mc_map(const struct in6_addr *addr, char *buf,
+                                             struct net_device *dev, int dir);
 
 extern struct sk_buff           *ndisc_build_skb(struct net_device *dev,
                                                  const struct in6_addr *daddr,