diff --git a/sched/thread.c b/sched/thread.c
index a293198..4786030 100644
--- a/sched/thread.c
+++ b/sched/thread.c
@@ -77,6 +77,7 @@ struct thread *create_idle_thread(void)
 
 	struct thread *thr = thread_alloc();
 
+	thr->tr_parent = idle;
 	thr->tr_prio = PRIO_NORMAL;
 	thr->tr_state = THREAD_READY;
 	thr->tr_quantum_target = default_quantum();