diff --git a/include/net/if_inet6.h b/include/net/if_inet6.h
index c8effa4..9e9139c 100644
--- a/include/net/if_inet6.h
+++ b/include/net/if_inet6.h
@@ -163,6 +163,7 @@ struct inet6_dev
 	struct inet6_ifaddr	*addr_list;
 
 	struct ifmcaddr6	*mc_list;
+	int			mc_count;	          /* Number of installed mcasts	*/
 	struct ifmcaddr6	*mc_tomb;
 	rwlock_t		mc_lock;
 	unsigned char		mc_qrv;
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index e7c03bc..835521d 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -922,6 +922,7 @@ int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr)
 
 	mc->next = idev->mc_list;
 	idev->mc_list = mc;
+	mc->idev->mc_count++;
 	write_unlock_bh(&idev->lock);
 
 	mld_del_delrec(idev, &mc->mca_addr);
@@ -943,7 +944,7 @@ int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr)
 			if (--ma->mca_users == 0) {
 				*map = ma->next;
 				write_unlock_bh(&idev->lock);
-
+				idev->mc_count--;
 				igmp6_group_dropped(ma);
 
 				ma_put(ma);
@@ -2288,6 +2289,7 @@ void ipv6_mc_init_dev(struct inet6_dev *idev)
 			(unsigned long)idev);
 	idev->mc_tomb = NULL;
 	idev->mc_ifc_count = 0;
+	idev->mc_count=0;
 	setup_timer(&idev->mc_ifc_timer, mld_ifc_timer_expire,
 			(unsigned long)idev);
 	idev->mc_qrv = MLD_QRV_DEFAULT;