diff --git a/include/net/pkt_sched.h b/include/net/pkt_sched.h
index 9cd2d4e84913..d0d9dd2483dd 100644
--- a/include/net/pkt_sched.h
+++ b/include/net/pkt_sched.h
@@ -141,7 +141,7 @@ extern const struct nla_policy rtm_tca_policy[TCA_MAX + 1];
  */
 static inline unsigned int psched_mtu(const struct net_device *dev)
 {
-	return dev->mtu + dev->hard_header_len;
+	return READ_ONCE(dev->mtu) + dev->hard_header_len;
 }
 
 static inline struct net *qdisc_net(struct Qdisc *q)