diff --git a/documentation/ref-manual/ref-classes.xml b/documentation/ref-manual/ref-classes.xml
index b533ee9d3b..c9fedb20bb 100644
--- a/documentation/ref-manual/ref-classes.xml
+++ b/documentation/ref-manual/ref-classes.xml
@@ -1701,6 +1701,17 @@
     </para>
 </section>
 
+<section id='ref-classes-setuptools'>
+    <title><filename>setuptools.bbclass</filename></title>
+
+    <para>
+        The <filename>setuptools</filename> class supports extensions that use
+        setuptools-based build systems.
+        If your recipe uses these build systems, the recipe needs to
+        inherit the <filename>setuptools</filename> class.
+    </para>
+</section>
+
 <section id='ref-classes-distutils'>
     <title>Python Extensions - <filename>distutils.bbclass</filename></title>
 
@@ -1712,12 +1723,16 @@
         <itemizedlist>
             <listitem><para>Extensions that use an Autotools-based build system
                 require Autotools and
-                <filename>distutils</filename>-based
-                <filename>.bbclasse</filename> files in their recipes.
+                <filename>distutils</filename>-based classes in their recipes.
                 </para></listitem>
             <listitem><para>Extensions that use
                 <filename>distutils</filename>-based build systems require
-                <filename>distutils.bbclass</filename> in their recipes.
+                the <filename>distutils</filename> class in their recipes.
+                </para></listitem>
+            <listitem><para>Extensions that use the setuptools-based build
+                systems require the
+                <link linkend='ref-classes-setuptools'><filename>setuptools</filename></link>
+                class in their recipes.
                 </para></listitem>
         </itemizedlist>
     </para>