diff --git a/documentation/dev-manual/dev-manual-common-tasks.xml b/documentation/dev-manual/dev-manual-common-tasks.xml
index c87212efa8..805badaa07 100644
--- a/documentation/dev-manual/dev-manual-common-tasks.xml
+++ b/documentation/dev-manual/dev-manual-common-tasks.xml
@@ -4623,6 +4623,9 @@
      allow_links
         True to allow symlinks to be matched - default
         False
+     summary
+        Summary to set for each package. Must include %s;
+        defaults to description if not set.
                      </literallayout>
                  </para>
             </section>