diff --git a/include/net/pkt_sched.h b/include/net/pkt_sched.h
index 891d80d..ec030cd 100644
--- a/include/net/pkt_sched.h
+++ b/include/net/pkt_sched.h
@@ -96,7 +96,7 @@
 					struct nlattr *tab);
 void qdisc_put_rtab(struct qdisc_rate_table *tab);
 void qdisc_put_stab(struct qdisc_size_table *tab);
-void qdisc_warn_nonwc(char *txt, struct Qdisc *qdisc);
+void qdisc_warn_nonwc(const char *txt, struct Qdisc *qdisc);
 int sch_direct_xmit(struct sk_buff *skb, struct Qdisc *q,
 		    struct net_device *dev, struct netdev_queue *txq,
 		    spinlock_t *root_lock);