diff --git a/kernel/sched_idletask.c b/kernel/sched_idletask.c
index 5ebf829..6e2ead4 100644
--- a/kernel/sched_idletask.c
+++ b/kernel/sched_idletask.c
@@ -57,7 +57,8 @@
 /*
  * Simple, special scheduling class for the per-CPU idle tasks:
  */
-static struct sched_class idle_sched_class __read_mostly = {
+const struct sched_class idle_sched_class = {
+	/* .next is NULL */
 	/* no enqueue/yield_task for idle tasks */
 
 	/* dequeue is not valid, we print a debug message there: */