diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 656110a..ffc3106 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1139,6 +1139,7 @@
 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
 extern struct net_device	*dev_get_by_index(struct net *net, int ifindex);
 extern struct net_device	*__dev_get_by_index(struct net *net, int ifindex);
+extern struct net_device	*dev_get_by_index_rcu(struct net *net, int ifindex);
 extern int		dev_restart(struct net_device *dev);
 #ifdef CONFIG_NETPOLL_TRAP
 extern int		netpoll_trap(void);