diff --git a/reference/mongodb/architecture.xml b/reference/mongodb/architecture.xml
index 4b17884f2b..44d79a2604 100644
--- a/reference/mongodb/architecture.xml
+++ b/reference/mongodb/architecture.xml
@@ -16,6 +16,7 @@
    <link linkend="book.mongo">mongo</link> extension. We refer to the new one
    as the <emphasis>mongodb</emphasis> extension.
   </para>
+
   <para>
    <mediaobject>
     <alt>Architecture Diagram</alt>
@@ -24,6 +25,7 @@
     </imageobject>
    </mediaobject>
   </para>
+
   <para>
    At the top of this stack sits a pure
    <link xlink:href="&url.mongodb.library;">PHP library</link>, which we will
@@ -37,6 +39,7 @@
    <link xlink:href="&url.mongodb.drivers;">drivers</link> maintained by
    MongoDB (and hopefully some community drivers, too).
   </para>
+
   <para>
    Sitting below that library we have the lower level driver.
    This extension will effectively form the glue between PHP and our