diff --git a/documentation/ref-manual/ref-classes.xml b/documentation/ref-manual/ref-classes.xml
index b4b12bb959..1c01638f1e 100644
--- a/documentation/ref-manual/ref-classes.xml
+++ b/documentation/ref-manual/ref-classes.xml
@@ -417,6 +417,15 @@
     </para>
 </section>
 
+<section id='ref-classes-cml1'>
+    <title><filename>cml1.bbclass</filename></title>
+
+    <para>
+        The <filename>cml1</filename> class provides basic support for the
+        Linux kernel style build configuration system.
+    </para>
+</section>
+
 <section id='ref-classes-debian'>
     <title>Debian Renaming - <filename>debian.bbclass</filename></title>