diff --git a/source/reference/operator/aggregation/sample.txt b/source/reference/operator/aggregation/sample.txt
index 00e3f84e487..00f038d5f1e 100644
--- a/source/reference/operator/aggregation/sample.txt
+++ b/source/reference/operator/aggregation/sample.txt
@@ -47,19 +47,6 @@ If any of the previous conditions are false, :pipeline:`$sample`:
    Random sorts are subject to the :ref:`sort memory restrictions
    <sort-memory-limit>`.
 
-MMAPv1 May Return Duplicate Documents
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-If you are using the:
-
-- MMAPv1 storage engine, :pipeline:`$sample` may return the same
-  document more than once in the result set.
-
-- :ref:`WiredTiger <storage-wiredtiger>` or
-  :ref:`in-memory <storage-inmemory>` storage engine,
-  :pipeline:`$sample` does not return duplicate documents. WiredTiger
-  is the default storage engine as of MongoDB 3.2.
-
 Example
 --------