diff --git a/arch/x86_64/acpi/smp.cpp b/arch/x86_64/acpi/smp.cpp
index e0e8471..7aedba3 100644
--- a/arch/x86_64/acpi/smp.cpp
+++ b/arch/x86_64/acpi/smp.cpp
@@ -30,6 +30,7 @@ extern "C" void ap_trampoline_exit(void)
 	this_cpu->c_data = self;
 
 	struct thread *this_thread = create_idle_thread();
+	this_thread->tr_id = __this_ap_id;
 	this_thread->tr_kstack = (struct vm_page *)__ap_stack_page;
 	self->c_rq.rq_idle = self->c_rq.rq_cur = this_thread;