diff --git a/xsoft/office/libreoffice.xml b/xsoft/office/libreoffice.xml
index 629e3ac749..41566dcd27 100644
--- a/xsoft/office/libreoffice.xml
+++ b/xsoft/office/libreoffice.xml
@@ -635,6 +635,15 @@ fi</userinput></screen>
       via PackageKit.
     </para>
 
+    <para>
+      <option>--disable-firebird-sdbc</option>: By default, the ability to
+      connect to a <application>firebird</application> database is enabled.
+      This is regarded as 'experimental' and from time to time the unit test
+      CppunitTest_dbaccess_firebird_test fails near the end of the build. If
+      you need to connect to such a database, and the build fails for you,
+      you will need to build <xref linkend="gdb"/> to help upstream debug it.
+    </para>
+
     <para>
       <option>--disable-gstreamer-1-0</option>: Use this switch if you have not
       installed <xref linkend="gst10-plugins-base"/>.