diff --git a/docs/versionhistory.rst b/docs/versionhistory.rst
index 50745252..7f2af231 100644
--- a/docs/versionhistory.rst
+++ b/docs/versionhistory.rst
@@ -2,7 +2,11 @@ Version history
 ===============
 
 This library adheres to `Semantic Versioning 2.0 <http://semver.org/>`_.
-
+**UNRELEASED**
+- Configure ``SO_RCVBUF``, ``SO_SNDBUF`` and ``TCP_NODELAY`` on the selector
+  thread waker socket pair. This should improve the performance of ``wait_readable()``
+  and ``wait_writable()`` when using the ``ProactorEventLoop``
+  (`#836 <https://github.com/agronholm/anyio/pull/836>`_) (PR by @graingert)
 **4.7.0**
 
 - Updated ``TaskGroup`` to work with asyncio's eager task factories