diff --git a/documentation/ref-manual/ref-classes.xml b/documentation/ref-manual/ref-classes.xml
index 53ba07d194..b6275bca17 100644
--- a/documentation/ref-manual/ref-classes.xml
+++ b/documentation/ref-manual/ref-classes.xml
@@ -491,7 +491,8 @@
                 which would be a packaging bug.</para></listitem>
             <listitem><para><emphasis><filename>pkgconfig:</filename></emphasis>
                 Checks <filename>.pc</filename> files for any
-                <filename>TMPDIR/WORKDIR</filename> paths.
+                <link linkend='var-TMPDIR'><filename>TMPDIR</filename></link>/<link linkend='var-WORKDIR'><filename>WORKDIR</filename></link>
+                paths.
                 Any <filename>.pc</filename> file containing these paths is incorrect
                 since <filename>pkg-config</filename> itself adds the correct sysroot prefix
                 when the files are accessed.</para></listitem>