diff --git a/source/reference/connection-string.txt b/source/reference/connection-string.txt
index 052a0b7b75e..5f2285a2496 100644
--- a/source/reference/connection-string.txt
+++ b/source/reference/connection-string.txt
@@ -112,7 +112,7 @@ The components of this string are:
 
    .. code-block:: none
 
-      mongodb://db1.example.net,db2.example.net:2500/?replicaSet=test
+      mongodb://db1.example.net:27017,db2.example.net:2500/?replicaSet=test
 
 
    .. include:: /includes/fact-uri-rs-hostnames.rst
@@ -147,7 +147,7 @@ Connection options are pairs in the following form: ``name=value``. The
 
 .. code-block:: none
 
-   mongodb://db1.example.net,db2.example.net:2500/?replicaSet=test&connectTimeoutMS=300000
+   mongodb://db1.example.net:27017,db2.example.net:2500/?replicaSet=test&connectTimeoutMS=300000
 
 .. admonition:: Semi-colon separator for connection string arguments