diff --git a/docs/changelog.rst b/docs/changelog.rst
index 551d3b2d..787b9c91 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -30,7 +30,7 @@ Changes in dev
 - Added insert method for bulk inserts
 - Added blinker signal support
 - Added query_counter context manager for tests
-- Added optional map_reduce method item_frequencies
+- Added map_reduce method item_frequencies and set as default (as db.eval doesn't work in sharded environments)
 - Added inline_map_reduce option to map_reduce
 - Updated connection exception so it provides more info on the cause.
 - Added searching multiple levels deep in ``DictField``