diff --git a/sdk/storage/Azure.Storage.Blobs/CHANGELOG.md b/sdk/storage/Azure.Storage.Blobs/CHANGELOG.md
index e9ca4e02a9d9b..57a1b6ae83915 100644
--- a/sdk/storage/Azure.Storage.Blobs/CHANGELOG.md
+++ b/sdk/storage/Azure.Storage.Blobs/CHANGELOG.md
@@ -1,7 +1,7 @@
 # Release History
 
 ## 12.9.0-beta.2 (Unreleased)
-
+ - Fixed bug where `Stream` returned by `BlockBlobClient.OpenWrite` could corrupt blocks if flushed between writes.
 
 ## 12.9.0-beta.1 (2021-02-09)
 - Added support for service version 2020-06-12.