diff --git a/releases.md b/releases.md
index 748fdd5c..a0a2063a 100644
--- a/releases.md
+++ b/releases.md
@@ -1,5 +1,9 @@
 # Releases
 
+## Unreleased
+
+  - Add support for `Sync(annotation:)`, so that you can annotate the block with a description of what it does, even if it doesn't create a new task.
+
 ## v2.17.0
 
   - Introduce `Async::Queue#push` and `Async::Queue#pop` for compatibility with `::Queue`.