diff --git a/net/sched/sch_cbs.c b/net/sched/sch_cbs.c
index 7c40b0ff756f1b9010a4e4719a731a2cd946b9e6..ce7965cc40180143cd161cec65e9b588dfd2c9bd 100644
--- a/net/sched/sch_cbs.c
+++ b/net/sched/sch_cbs.c
@@ -311,7 +311,7 @@ static void cbs_set_port_rate(struct net_device *dev, struct cbs_sched_data *q)
 	if (err < 0)
 		goto skip;
 
-	if (ecmd.base.speed != SPEED_UNKNOWN)
+	if (ecmd.base.speed && ecmd.base.speed != SPEED_UNKNOWN)
 		speed = ecmd.base.speed;
 
 skip: