diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index d2c043a..d11a5e1 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -714,6 +714,7 @@
 extern void br_init_port(struct net_bridge_port *p);
 extern void br_become_designated_port(struct net_bridge_port *p);
 
+extern void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
 extern int br_set_forward_delay(struct net_bridge *br, unsigned long x);
 extern int br_set_hello_time(struct net_bridge *br, unsigned long x);
 extern int br_set_max_age(struct net_bridge *br, unsigned long x);