diff --git a/documentation/ref-manual/ref-classes.xml b/documentation/ref-manual/ref-classes.xml
index 8a26efad59..a3a198a2fa 100644
--- a/documentation/ref-manual/ref-classes.xml
+++ b/documentation/ref-manual/ref-classes.xml
@@ -1948,6 +1948,24 @@
     </para>
 </section>
 
+<section id='ref-classes-sstate'>
+    <title><filename>sstate.bbclass</filename></title>
+
+    <para>
+        The <filename>sstate</filename> class provides support for Shared
+        State (sstate).
+        By default, the class is enabled through the
+        <link linkend='var-INHERIT_DISTRO'><filename>INHERIT_DISTRO</filename></link>
+        variable's default value.
+    </para>
+
+    <para>
+        For more information on sstate, see the
+        "<link linkend='shared-state-cache'>Shared State Cache</link>"
+        section.
+    </para>
+</section>
+
 <section id='ref-classes-package_tar'>
     <title><filename>package_tar.bbclass</filename></title>