diff --git a/docs/changelog.rst b/docs/changelog.rst
index 87247d57..551d3b2d 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -5,6 +5,7 @@ Changelog
 Changes in dev
 ==============
 
+- Updated sum / average to use map_reduce as db.eval doesn't work in sharded environments
 - Added where() - filter to allowing users to specify query expressions as Javascript
 - Added SequenceField - for creating sequential counters
 - Added update() convenience method to a document