diff --git a/arch/x86_64/acpi/smp.cpp b/arch/x86_64/acpi/smp.cpp
index 7aedba3..bbe113b 100644
--- a/arch/x86_64/acpi/smp.cpp
+++ b/arch/x86_64/acpi/smp.cpp
@@ -56,6 +56,7 @@ static int init_ap(struct acpi_madt_record *rec, local_apic& lapic, uint8_t bsp_
 		return 0;
 	}
 
+	__this_ap_ok = 0;
 	__ap_stack_page = vm_page_alloc(VM_PAGE_4K, VM_NORMAL);
 	__ap_stack_top = (uintptr_t)vm_page_get_vaddr((struct vm_page *)__ap_stack_page) + VM_PAGE_SIZE;
 	__this_ap_id = ap_lapic->l_apic_id;