diff --git a/functions/strings.xml b/functions/strings.xml
index 2c33fc14a7..223c9ef0f3 100644
--- a/functions/strings.xml
+++ b/functions/strings.xml
@@ -765,7 +765,8 @@ $original = strtr ($str, $trans);
 	 and single quotes unconverted.
     </para>
     <para>
-     At present, the ISO-8859-1 character set is used.
+     At present, the ISO-8859-1 character set is used.  Note that the optional
+	 second argument was added in PHP 3.0.17 and PHP 4.0.3.
     </para>
     <para>
      See also <function>htmlspecialchars</function> and
@@ -847,9 +848,10 @@ $new = htmlspecialchars("&lt;a href='test'&gt;Test&lt;/a&gt;", ENT_QUOTES);
      </example>
     </para>
     <para>
-     Note that this functions does not translate anything beyond what
+     Note that this function does not translate anything beyond what
      is listed above. For full entity translation, see
-     <function>htmlentities</function>.
+     <function>htmlentities</function>.  Also note that the optional second
+	 argument was added in PHP 3.0.17 and PHP 4.0.3.
     </para>
     <para>
      See also <function>htmlentities</function> and