From 132171c90e8d7e6498aaec4961006e61a604bcc5 Mon Sep 17 00:00:00 2001
From: Pierre-Marie Pédrot
Date: Tue, 24 Nov 2020 17:58:12 +0100
Subject: Add a changelog.

---
 doc/changelog/12-misc/13405-less-wrong-micromega-cache.rst | 6 ++++++
 1 file changed, 6 insertions(+)
 create mode 100644 doc/changelog/12-misc/13405-less-wrong-micromega-cache.rst

diff --git a/doc/changelog/12-misc/13405-less-wrong-micromega-cache.rst b/doc/changelog/12-misc/13405-less-wrong-micromega-cache.rst
new file mode 100644
index 0000000000..9ed013245e
--- /dev/null
+++ b/doc/changelog/12-misc/13405-less-wrong-micromega-cache.rst
@@ -0,0 +1,6 @@
+- **Changed:**
+  The representation of micromega caches was slightly
+  altered for efficiency purposes. As a consequence
+  all stale caches must be cleaned up
+  (`#13405 <https://github.com/coq/coq/pull/13405>`_,
+  by Pierre-Marie Pédrot).
-- 
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