diff --git a/docs/changelog.rst b/docs/changelog.rst
index f0ad3f9f..ac9f37be 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -42,6 +42,8 @@ Core Library
   signal the connection has broken, even when one participant is not a parent
   of the other.
 
+* `9ec360c2 <https://github.com/dw/mitogen/commit/9ec360c2>`_: a new
+  :meth:`mitogen.core.Broker.defer_sync` utility function is provided.
 
 
 v0.2.3 (2018-10-23)