diff --git a/include/hexagram/schedule.h b/include/hexagram/schedule.h
index c462a2c..97a386e 100644
--- a/include/hexagram/schedule.h
+++ b/include/hexagram/schedule.h
@@ -20,6 +20,8 @@ typedef struct _hexagram_schedule {
 hexagram_schedule *hexagram_schedule_create(hexagram_table_entry *table,
                                             size_t count);
 
+void hexagram_schedule_destroy(hexagram_schedule *schedule);
+
 int hexagram_schedule_run(hexagram_schedule *schedule);
 
 int hexagram_schedule_stop(hexagram_schedule *schedule);