diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h
index 8451722..2eb3814 100644
--- a/include/net/netns/ipv4.h
+++ b/include/net/netns/ipv4.h
@@ -63,6 +63,9 @@
 	atomic_t		cache_resolve_queue_len;
 	int			mroute_do_assert;
 	int			mroute_do_pim;
+#if defined(CONFIG_IP_PIMSM_V1) || defined(CONFIG_IP_PIMSM_V2)
+	int			mroute_reg_vif_num;
+#endif
 #endif
 };
 #endif
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index d6a28ac..346e67b 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -197,14 +197,12 @@
 
 #ifdef CONFIG_IP_PIMSM
 
-static int reg_vif_num = -1;
-
 static int reg_vif_xmit(struct sk_buff *skb, struct net_device *dev)
 {
 	read_lock(&mrt_lock);
 	dev->stats.tx_bytes += skb->len;
 	dev->stats.tx_packets++;
-	ipmr_cache_report(skb, reg_vif_num, IGMPMSG_WHOLEPKT);
+	ipmr_cache_report(skb, init_net.ipv4.mroute_reg_vif_num, IGMPMSG_WHOLEPKT);
 	read_unlock(&mrt_lock);
 	kfree_skb(skb);
 	return 0;
@@ -292,8 +290,8 @@
 	}
 
 #ifdef CONFIG_IP_PIMSM
-	if (vifi == reg_vif_num)
-		reg_vif_num = -1;
+	if (vifi == init_net.ipv4.mroute_reg_vif_num)
+		init_net.ipv4.mroute_reg_vif_num = -1;
 #endif
 
 	if (vifi+1 == init_net.ipv4.maxvif) {
@@ -439,7 +437,7 @@
 		 * Special Purpose VIF in PIM
 		 * All the packets will be sent to the daemon
 		 */
-		if (reg_vif_num >= 0)
+		if (init_net.ipv4.mroute_reg_vif_num >= 0)
 			return -EADDRINUSE;
 		dev = ipmr_reg_vif();
 		if (!dev)
@@ -505,7 +503,7 @@
 	v->dev = dev;
 #ifdef CONFIG_IP_PIMSM
 	if (v->flags&VIFF_REGISTER)
-		reg_vif_num = vifi;
+		init_net.ipv4.mroute_reg_vif_num = vifi;
 #endif
 	if (vifi+1 > init_net.ipv4.maxvif)
 		init_net.ipv4.maxvif = vifi+1;
@@ -623,7 +621,7 @@
 		memcpy(msg, skb_network_header(pkt), sizeof(struct iphdr));
 		msg->im_msgtype = IGMPMSG_WHOLEPKT;
 		msg->im_mbz = 0;
-		msg->im_vif = reg_vif_num;
+		msg->im_vif = init_net.ipv4.mroute_reg_vif_num;
 		ip_hdr(skb)->ihl = sizeof(struct iphdr) >> 2;
 		ip_hdr(skb)->tot_len = htons(ntohs(ip_hdr(pkt)->tot_len) +
 					     sizeof(struct iphdr));
@@ -1506,8 +1504,8 @@
 		return 1;
 
 	read_lock(&mrt_lock);
-	if (reg_vif_num >= 0)
-		reg_dev = init_net.ipv4.vif_table[reg_vif_num].dev;
+	if (init_net.ipv4.mroute_reg_vif_num >= 0)
+		reg_dev = init_net.ipv4.vif_table[init_net.ipv4.mroute_reg_vif_num].dev;
 	if (reg_dev)
 		dev_hold(reg_dev);
 	read_unlock(&mrt_lock);
@@ -1940,6 +1938,10 @@
 		err = -ENOMEM;
 		goto fail_mfc_cache;
 	}
+
+#ifdef CONFIG_IP_PIMSM
+	net->ipv4.mroute_reg_vif_num = -1;
+#endif
 	return 0;
 
 fail_mfc_cache: