diff --git a/documentation/ref-manual/ref-classes.xml b/documentation/ref-manual/ref-classes.xml
index 964193f9e2..3bdd084a84 100644
--- a/documentation/ref-manual/ref-classes.xml
+++ b/documentation/ref-manual/ref-classes.xml
@@ -1516,6 +1516,13 @@
                 <filename>FILES_${PN} = "xyz"</filename> effectively turn into
                 <filename>FILES = "xyz"</filename>.
                 </para></listitem>
+            <listitem><para><emphasis><filename>symlink-to-sysroot:</filename></emphasis>
+                Checks for symlinks in packages that point into
+                <link linkend='var-TMPDIR'><filename>TMPDIR</filename></link>
+                on the host.
+                Such symlinks will work on the host, but are clearly invalid
+                when running on the target.
+                </para></listitem>
             <listitem><para><emphasis><filename>unsafe-references-in-binaries:</filename></emphasis>
                 Reports when a binary installed in
                 <filename>${base_libdir}</filename>,