diff --git a/UPGRADE.md b/UPGRADE.md
index 052d879fe..ed9a538b3 100644
--- a/UPGRADE.md
+++ b/UPGRADE.md
@@ -138,6 +138,10 @@ From now on, the resultset will look like this:
         ...
     )
 
+## Minor BC BREAK: added second parameter $indexBy in EntityRepository#createQueryBuilder method signature
+
+Added way to access the underlying QueryBuilder#from() method's 'indexBy' parameter when using EntityRepository#createQueryBuilder()
+
 # Upgrade to 2.4
 
 ## BC BREAK: Compatibility Bugfix in PersistentCollection#matching()