diff --git a/reference/stats/functions/stats-cdf-poisson.xml b/reference/stats/functions/stats-cdf-poisson.xml
index fa4a344ce1..43b026bfc6 100644
--- a/reference/stats/functions/stats-cdf-poisson.xml
+++ b/reference/stats/functions/stats-cdf-poisson.xml
@@ -90,6 +90,7 @@
  </refsect1>
 
  <refsect1 role="returnvalues">
+  &reftitle.returnvalues;
   <para>
    Returns CDF, x, or lambda, determined by <parameter>which</parameter>.
   </para>