diff --git a/source/release-notes/2.6-compatibility.txt b/source/release-notes/2.6-compatibility.txt
index 220546d8500..c913789f9ca 100644
--- a/source/release-notes/2.6-compatibility.txt
+++ b/source/release-notes/2.6-compatibility.txt
@@ -180,6 +180,10 @@ Description
   :method:`db.collection.update()`, :method:`db.collection.save()`
   and :method:`db.collection.remove()` for details.
 
+- In sharded environments, :program:`mongos` no longer supports "fire and
+  forget" behavior. This limits throughput when writing data to sharded
+  clusters.
+
 .. [#mongo-shell-gle-interactive]
    In previous versions, when using the :program:`mongo` shell
    interactively, the :program:`mongo` shell automatically called the
@@ -194,6 +198,10 @@ Solution
   operations with "fire-and-forget" behavior should use the
   :method:`Bulk()` methods.
 
+  In sharded environments, applications using any driver or
+  :program:`mongo` shell should use :method:`Bulk()` methods for optimal
+  performance.
+
   For example, instead of:
 
   .. code-block:: javascript