diff --git a/source/reference/aggregation/geoNear.txt b/source/reference/aggregation/geoNear.txt
index 716a63c12dc..c3e4a826dbc 100644
--- a/source/reference/aggregation/geoNear.txt
+++ b/source/reference/aggregation/geoNear.txt
@@ -35,9 +35,15 @@ $geoNear (aggregation)
                  distance. You can use the :term:`dot notation` to
                  specify a field within a subdocument.
 
-   :field number num:
+   :field number limit:
                  Optional. Specifies the maximum number of documents to
-                 return. The default value is 100.
+                 return. The default value is 100. See also the ``num``
+                 option.
+
+   :field number num:
+                 Optional. Synonym for the ``limit`` option. If both
+                 ``num`` and ``limit`` are included, the ``num`` value
+                 overrides the ``limit`` value.
 
    :field number maxDistance: Optional.
                  Limits the results to the documents within the
diff --git a/source/reference/command/geoNear.txt b/source/reference/command/geoNear.txt
index 6ffee9a2e20..f37056b31b1 100644
--- a/source/reference/command/geoNear.txt
+++ b/source/reference/command/geoNear.txt
@@ -35,9 +35,14 @@ geoNear
    :field near: Can use either a GeoJSON point or legacy points,
                 as shown above.
 
-   :field num: Optional. Specifies the maximum number of documents to
-               return. The default value is 100.
-
+   :field limit: Optional. Specifies the maximum number of documents to
+                 return. The default value is 100. See also the ``num``
+                 option.
+
+   :field num: Optional. Synonym for the ``limit`` option. If both
+               ``num`` and ``limit`` are included, the ``num`` value
+               overrides the ``limit`` value.
+                 
    :field maxDistance: Optional. Limits the results to those falling within
                        a given distance of the center coordinate. For
                        :term:`GeoJSON` data distance is in meters. For