diff --git a/kernel/sched/cpupri.c b/kernel/sched/cpupri.c
index 450a724b4542..2896860c8333 100644
--- a/kernel/sched/cpupri.c
+++ b/kernel/sched/cpupri.c
@@ -150,7 +150,7 @@ int cpupri_find_fitness(struct cpupri *cp, struct task_struct *p,
 {
 	int task_pri = convert_prio(p->prio);
 	int idx, cpu;
-	bool drop_nopreempts = task_pri <= MAX_RT_PRIO;
+	bool drop_nopreempts = task_pri <= MAX_RT_PRIO + 1;
 
 	BUG_ON(task_pri >= CPUPRI_NR_PRIORITIES);