diff --git a/relnotes/6.4 b/relnotes/6.4
--- a/relnotes/6.4
+++ b/relnotes/6.4
@@ -1,3 +1,11 @@
+= Mercurial 6.4.2 =
+
+Exceptional bugfix release due to a corruption bug that happens when using
+clonebundles on repositories with large files.
+
+ * revlog-split: make sure the self._indexfile attribute is reset (issue6811)
+
+
 = Mercurial 6.4.1 =
 
  * rhg: fix a bug in path encoding