diff --git a/kernel/smp.c b/kernel/smp.c
index 2cb44f9e4498..7f3671ac1667 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -813,7 +813,7 @@ void wake_up_all_idle_cpus(void)
 
 	for_each_possible_cpu(cpu) {
 		preempt_disable();
-		if (cpu != smp_processor_id() && cpu_online(cpu))
+		if (cpu != smp_processor_id() && cpu_online(cpu) && !cpu_isolated(cpu))
 			wake_up_if_idle(cpu);
 		preempt_enable();
 	}