diff --git a/docs/en/designers/language-custom-functions/language-function-html-options.xml b/docs/en/designers/language-custom-functions/language-function-html-options.xml
index 79fa0af3..674fdb1e 100644
--- a/docs/en/designers/language-custom-functions/language-function-html-options.xml
+++ b/docs/en/designers/language-custom-functions/language-function-html-options.xml
@@ -133,7 +133,8 @@ where template is:
   </para>
   <programlisting>
 <![CDATA[
-<select name=customer_id>
+{* note the php count() function to set size *}
+<select name=customer_id size="{$cust_options|@count}">
    {html_options options=$cust_options selected=$customer_id}
 </select>
 ]]>