diff --git a/source/reference/operator/aggregation/count.txt b/source/reference/operator/aggregation/count.txt
index e7638c62b5f..ac77c38bb11 100644
--- a/source/reference/operator/aggregation/count.txt
+++ b/source/reference/operator/aggregation/count.txt
@@ -60,6 +60,8 @@ The :pipeline:`$count` stage is equivalent to the following
 where ``myCount`` would be the output field that contains the count.
 You can specify another name for the output field.
 
+If the previous stage contains 0 documents, this stage will **NOT** return a single document with `{myCount: 0}`;  It will return the result of 0 documents, and this stage will not be executed.
+
 .. seealso::
 
    :method:`db.collection.countDocuments()` which wraps the