diff --git a/id_table.h b/id_table.h
index abd9eb5f38..07ad1b8e72 100644
--- a/id_table.h
+++ b/id_table.h
@@ -10,7 +10,6 @@ enum rb_id_table_iterator_result {
     ID_TABLE_STOP     = ST_STOP,
     ID_TABLE_DELETE   = ST_DELETE,
     ID_TABLE_REPLACE  = ST_REPLACE,
-    ID_TABLE_ITERATOR_RESULT_END
 };
 
 struct rb_id_table *rb_id_table_create(size_t size);