diff --git a/reference/outcontrol/functions/ob-implicit-flush.xml b/reference/outcontrol/functions/ob-implicit-flush.xml
index 1075ba7def..444e3c090f 100644
--- a/reference/outcontrol/functions/ob-implicit-flush.xml
+++ b/reference/outcontrol/functions/ob-implicit-flush.xml
@@ -28,7 +28,7 @@
      <term><parameter>flag</parameter></term>
      <listitem>
       <para>
-       &true; to turn implicit flushing on, &false; otherwise.
+       <literal>1</literal> to turn implicit flushing on, <literal>0</literal> otherwise.
       </para>
      </listitem>
     </varlistentry>