From a7a8adad88825f2e5396dc8698e0b912550807c6 Mon Sep 17 00:00:00 2001
From: Kazuhiko Sakaguchi
Date: Mon, 28 Sep 2020 22:12:00 +0900
Subject: Add a CHANGELOG entry

---
 CHANGELOG_UNRELEASED.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/CHANGELOG_UNRELEASED.md b/CHANGELOG_UNRELEASED.md
index 83a026a..5b1a709 100644
--- a/CHANGELOG_UNRELEASED.md
+++ b/CHANGELOG_UNRELEASED.md
@@ -255,6 +255,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
   + Lemmas `mid_in_itv(|oo|cc)` have been generalized from `realFieldType` to
     `numFieldType`.
 
+- The `class_of` records of structures are turned into primitive records to
+  prevent prevent potential issues of ambiguous paths and convertibility of
+  structure instances.
+
 ### Renamed
 
 - `big_rmcond` -> `big_rmcond_in` (cf Changed section)
-- 
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