diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 54f032cea040..b8f48763579b 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -7036,6 +7036,9 @@ void __init sched_init_smp(void)
 	alloc_cpumask_var(&non_isolated_cpus, GFP_KERNEL);
 	alloc_cpumask_var(&fallback_doms, GFP_KERNEL);
 
+	/* nohz_full won't take effect without isolating the cpus. */
+	tick_nohz_full_add_cpus_to(cpu_isolated_map);
+
 	sched_init_numa();
 
 	/*