diff --git a/metagpt/memory/longterm_memory.py b/metagpt/memory/longterm_memory.py
index b5bb73b6b..e73ae334e 100644
--- a/metagpt/memory/longterm_memory.py
+++ b/metagpt/memory/longterm_memory.py
@@ -2,7 +2,7 @@
 # -*- coding: utf-8 -*-
 """
 @Desc   : the implement of Long-term memory
-@Modified By: mashenquan, 2023-11-1. Optimization:
+@Modified By: mashenquan, 2023-11-1. According to Chapter 2.2.1 and 2.2.2 of RFC 116:
     1. Replace code related to message filtering with the `Message.is_recipient` function.
 """