diff --git a/lucene/CHANGES.txt b/lucene/CHANGES.txt
index c7e0995da39..8a9e258b278 100644
--- a/lucene/CHANGES.txt
+++ b/lucene/CHANGES.txt
@@ -224,6 +224,9 @@ Optimizations
 
 Bug Fixes
 
+* LUCENE-8065: It was still possible to construct a concave GeoExactCircle, so add
+   a check to prevent that. (Karl Wright)
+
 * LUCENE-7967: The GeoDegeneratePoint isWithin() method needed allowance for
    numerical precision. (Karl Wright)