diff --git a/documentation/ref-manual/ref-classes.xml b/documentation/ref-manual/ref-classes.xml
index 3103604542..beb6e3198d 100644
--- a/documentation/ref-manual/ref-classes.xml
+++ b/documentation/ref-manual/ref-classes.xml
@@ -651,8 +651,8 @@
                 <filename>distutils</filename>-based build systems require
                 the <filename>distutils</filename> class in their recipes.
                 </para></listitem>
-            <listitem><para>Extensions that use the setuptools-based build
-                systems require the
+            <listitem><para>Extensions that use build systems based on
+                <filename>setuptools</filename> require the
                 <link linkend='ref-classes-setuptools'><filename>setuptools</filename></link>
                 class in their recipes.
                 </para></listitem>
@@ -679,8 +679,8 @@
                 <filename>distutils</filename>-based build systems require
                 the <filename>distutils</filename> class in their recipes.
                 </para></listitem>
-            <listitem><para>Extensions that use the setuptools3-based build
-                systems require the
+            <listitem><para>Extensions that use build systems based on
+                <filename>setuptools3</filename> require the
                 <link linkend='ref-classes-setuptools'><filename>setuptools3</filename></link>
                 class in their recipes.
                 </para></listitem>
@@ -2691,7 +2691,8 @@
 
     <para>
         The <filename>setuptools3</filename> class supports Python
-        version 3.x extensions that use setuptools3-based build systems.
+        version 3.x extensions that use build systems based on
+        <filename>setuptools3</filename>.
         If your recipe uses these build systems, the recipe needs to
         inherit the <filename>setuptools3</filename> class.
     </para>