diff --git a/documentation/ref-manual/ref-classes.xml b/documentation/ref-manual/ref-classes.xml
index e17f1f4fab..c7b9922359 100644
--- a/documentation/ref-manual/ref-classes.xml
+++ b/documentation/ref-manual/ref-classes.xml
@@ -2718,6 +2718,23 @@
     </para>
 </section>
 
+<section id='ref-classes-utils'>
+    <title><filename>utils.bbclass</filename></title>
+
+    <para>
+        The <filename>utils</filename> class provides some useful Python
+        functions that are typically used in inline Python expressions
+        (e.g. <filename>${@...}</filename>).
+        One example use is for <filename>base_contains()</filename>.
+    </para>
+
+    <para>
+        This class is enabled by default because it is inherited by the
+        <link linkend='ref-classes-base'><filename>base</filename></link>
+        class.
+    </para>
+</section>
+
 <section id='ref-classes-externalsrc'>
     <title><filename>externalsrc.bbclass</filename></title>