diff --git a/reference/datetime/functions/date.xml b/reference/datetime/functions/date.xml
index 184272e1f3..77578ce732 100644
--- a/reference/datetime/functions/date.xml
+++ b/reference/datetime/functions/date.xml
@@ -496,6 +496,7 @@ $today = date("H:i:s");                         // 17:16:18
     <member><function>mktime</function></member>
     <member><function>strftime</function></member>
     <member><function>time</function></member>
+    <member><function>strtotime</function></member>
     <member><link linkend="datetime.constants.types">Predefined DateTime Constants</link></member>
    </simplelist>
   </para>