diff --git a/documentation/ref-manual/ref-classes.xml b/documentation/ref-manual/ref-classes.xml
index fb06c02c9a..35cf35b548 100644
--- a/documentation/ref-manual/ref-classes.xml
+++ b/documentation/ref-manual/ref-classes.xml
@@ -440,6 +440,18 @@
     </para>
 </section>
 
+<section id='ref-classes-core-image'>
+    <title><filename>core-image.bbclass</filename></title>
+
+    <para>
+        The Core Image <filename>core-image</filename> class
+        provides common definitions for the
+        <filename>core-image-*</filename> image recipes, such as support for
+        additional
+        <link linkend='var-IMAGE_FEATURES'><filename>IMAGE_FEATURES</filename></link>.
+    </para>
+</section>
+
 <section id='ref-classes-debian'>
     <title>Debian Renaming - <filename>debian.bbclass</filename></title>