diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index fd14df5..58bed75 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -563,7 +563,7 @@
 }
 EXPORT_SYMBOL(__qdisc_calculate_pkt_len);
 
-void qdisc_warn_nonwc(char *txt, struct Qdisc *qdisc)
+void qdisc_warn_nonwc(const char *txt, struct Qdisc *qdisc)
 {
 	if (!(qdisc->flags & TCQ_F_WARN_NONWC)) {
 		pr_warn("%s: %s qdisc %X: is non-work-conserving?\n",