diff --git a/kernel/cpu.c b/kernel/cpu.c
index c996963325bb..5691a3c8bc92 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -1000,7 +1000,7 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen,
 	struct cpuhp_cpu_state *st = per_cpu_ptr(&cpuhp_state, cpu);
 	int prev_state, ret = 0;
 
-	if (num_active_cpus() == 1)
+	if (num_online_cpus() == 1)
 		return -EBUSY;
 
 	if (!cpu_present(cpu))