diff --git a/documentation/ref-manual/ref-classes.xml b/documentation/ref-manual/ref-classes.xml
index 71df79fa62..a6b1e3dbed 100644
--- a/documentation/ref-manual/ref-classes.xml
+++ b/documentation/ref-manual/ref-classes.xml
@@ -2983,6 +2983,10 @@
         The <filename>rootfs*</filename> classes support creating
         the root filesystem for an image and consist of the following classes:
         <itemizedlist>
+            <listitem><para>
+                The <filename>rootfs-postcommands</filename> class, which
+                defines filesystem post-processing functions for image recipes.
+                </para></listitem>
             <listitem><para>
                 The <filename>rootfs_deb</filename> class, which supports
                 creation of root filesystems for images built using