diff --git a/source/includes/2.4-2.6-upgrade-downgrade-procedure.rst b/source/includes/2.4-2.6-upgrade-downgrade-procedure.rst
index 3c2cf72b632..b21f320bca1 100644
--- a/source/includes/2.4-2.6-upgrade-downgrade-procedure.rst
+++ b/source/includes/2.4-2.6-upgrade-downgrade-procedure.rst
@@ -4,8 +4,8 @@
 ------------------
 
 Once upgraded to MongoDB 2.6, you **cannot** downgrade to **any** version
-earlier than MongoDB 2.4. If you have ``text`` indexes, you can only
-downgrade to MongoDB 2.4.10 or later.
+earlier than MongoDB 2.4. If you have ``text`` or ``2dsphere`` indexes,
+you can only downgrade to MongoDB 2.4.10 or later.
 
 **Except** as described on this page, moving between 2.4 and 2.6 is a
 drop-in replacement: