diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index cda8315..dd58317 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -208,7 +208,7 @@
 	return br_port_exists(dev) ? port : NULL;
 }
 
-static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev)
+static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
 {
 	return br_port_exists(dev) ?
 		rtnl_dereference(dev->rx_handler_data) : NULL;