diff --git a/reference/mongodb/mongodb/driver/manager/construct.xml b/reference/mongodb/mongodb/driver/manager/construct.xml
index 455bc8506e..d344f1db40 100644
--- a/reference/mongodb/mongodb/driver/manager/construct.xml
+++ b/reference/mongodb/mongodb/driver/manager/construct.xml
@@ -46,12 +46,12 @@
       A <link xlink:href="&url.mongodb.docs;reference/connection-string/">mongodb://</link> connection URI:
       <programlisting role="txt">
 <![CDATA[
-mongodb://[username:password@]host1[:port1][,host2[:port2],...[,hostN[:portN]]][/[database][?options]]
+mongodb://[username:password@]host1[:port1][,host2[:port2],...[,hostN[:portN]]][/[defaultAuthDb][?options]]
 ]]>
       </programlisting>
      </para>
      <para>
-      For details on supported options, see
+      For details on supported URI options, see
       <link xlink:href="&url.mongodb.docs;reference/connection-string/#connections-connection-options">Connection String Options</link>
       in the MongoDB manual.
       <link xlink:href="&url.mongodb.docs;reference/connection-string/#connection-pool-options">Connection pool options</link>
@@ -68,6 +68,15 @@ mongodb://[username:password@]host1[:port1][,host2[:port2],...[,hostN[:portN]]][
       The <function>rawurlencode</function> function may be used to encode
       constituent parts of the URI.
      </para>
+     <para>
+      The <literal>defaultAuthDb</literal> component may be used to specify the
+      database name associated with the user's credentials; however the
+      <literal>authSource</literal> URI option will take priority if specified.
+      If neither <literal>defaultAuthDb</literal> nor
+      <literal>authSource</literal> are specified, the <literal>admin</literal>
+      database will be used by default. The <literal>defaultAuthDb</literal>
+      component has no effect in the absence of user credentials.
+     </para>
     </listitem>
    </varlistentry>
    <varlistentry xml:id="mongodb-driver-manager.construct-urioptions">
@@ -145,7 +154,8 @@ mongodb://[username:password@]host1[:port1][,host2[:port2],...[,hostN[:portN]]][
           <entry>
            <para>
             The database name associated with the user's credentials. Defaults
-            to the database component of the connection URI.
+            to the database component of the connection URI, or the
+            <literal>admin</literal> database if both are unspecified.
            </para>
            <para>
             For authentication mechanisms that delegate credential storage to
@@ -1071,7 +1081,7 @@ $manager = new MongoDB\Driver\Manager("mongodb://mongos1.example.com,mongos2.exa
 <![CDATA[
 <?php
 
-$manager = new MongoDB\Driver\Manager("mongodb://myusername:mypassword@example.com/mydatabase");
+$manager = new MongoDB\Driver\Manager("mongodb://myusername:mypassword@example.com/?authSource=databaseName");
 
 ?>
 ]]>
@@ -1090,7 +1100,7 @@ $manager = new MongoDB\Driver\Manager("mongodb://myusername:mypassword@example.c
 <![CDATA[
 <?php
 
-$manager = new MongoDB\Driver\Manager("mongodb://myusername:myp%40ss%3Aw%25rd@example.com/mydatabase");
+$manager = new MongoDB\Driver\Manager("mongodb://myusername:myp%40ss%3Aw%25rd@example.com/?authSource=databaseName");
 
 ?>
 ]]>