diff --git a/kernel/cpu.c b/kernel/cpu.c
index 80b606d..f80afc6 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -2267,6 +2267,8 @@
  */
 void __init boot_cpu_hotplug_init(void)
 {
+#ifdef CONFIG_SMP
 	this_cpu_write(cpuhp_state.booted_once, true);
+#endif
 	this_cpu_write(cpuhp_state.state, CPUHP_ONLINE);
 }