diff --git a/source/reference/method/rs.addArb.txt b/source/reference/method/rs.addArb.txt
index 17e0954f7da..62e1074702c 100644
--- a/source/reference/method/rs.addArb.txt
+++ b/source/reference/method/rs.addArb.txt
@@ -17,6 +17,9 @@ Description
 
    Adds a new :term:`arbiter` to an existing replica set.
 
+   ``rs.add(<host>, true)`` is functionally the same as 
+   ``rs.addArb(<host>)``. You can use these commands interchangeably.
+
    .. include:: /includes/admonition-multiple-arbiters.rst
 
    The :method:`rs.addArb()` method takes the following parameter: