Index: sys/kern/kern_timeout.c
===================================================================
--- sys/kern/kern_timeout.c
+++ sys/kern/kern_timeout.c
@@ -392,7 +392,7 @@
 		cc->cc_thread = td;
 		thread_lock(td);
 		sched_class(td, PRI_ITHD);
-		sched_prio(td, PI_SWI(SWI_CLOCK));
+		sched_prio(td, PI_REALTIME);
 		TD_SET_IWAIT(td);
 		thread_lock_set(td, (struct mtx *)&cc->cc_lock);
 		thread_unlock(td);