diff --git a/kernel/smp.c b/kernel/smp.c
index abdc48cd79a3..b2ec21c5c9d6 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -766,8 +766,8 @@ void wake_up_all_idle_cpus(void)
 	for_each_online_cpu(cpu) {
 		if (cpu == smp_processor_id())
 			continue;
-
-		wake_up_if_idle(cpu);
+		if (!cpu_isolated(cpu))
+			wake_up_if_idle(cpu);
 	}
 	preempt_enable();
 }