--- a/net/bridge/br_stp_timer.c
+++ b/net/bridge/br_stp_timer.c
@@ -158,6 +158,7 @@ void br_stp_port_timer_init(struct net_bridge_port *p)
 {
        setup_timer(&p->message_age_timer, br_message_age_timer_expired,
                      (unsigned long) p);
+       set_timer_slack(&p->message_age_timer, 0);
 
        setup_timer(&p->forward_delay_timer, br_forward_delay_timer_expired,
                      (unsigned long) p);