diff --git a/CHANGES.rst b/CHANGES.rst
index b769b0f046..6df4bd9e38 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,5 +1,12 @@
+Changes in <unreleased>
+=======================
+
+This release adds an index to the events table. This means that on first
+startup there will be an inceased amount of IO until the index is created.
+
+
 Changes in synapse v0.29.0 (2018-05-16)
-===========================================
+=======================================
 
 
 Changes in synapse v0.29.0-rc1 (2018-05-14)