diff --git a/language/functions.xml b/language/functions.xml
index 95116dd021..c82a01123c 100644
--- a/language/functions.xml
+++ b/language/functions.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.52 $ -->
+<!-- $Revision: 1.53 $ -->
  <chapter id="language.functions">
   <title>Functions</title>
 
@@ -131,7 +131,7 @@ bar();
     PHP 3 does not support variable numbers of arguments to functions,
     although default arguments are supported (see <link
     linkend="functions.arguments.default">Default argument
-    values</link> for more information). PHP 4 supports both: see <link
+    values</link> for more information). PHP 4 and above supports both: see <link
     linkend="functions.variable-arg-list">Variable-length argument
     lists</link> and the function references for
     <function>func_num_args</function>,
@@ -338,6 +338,10 @@ echo makeyogurt("raspberry");   // works as expected
 Making a bowl of acidophilus raspberry.
      </screen>
     </para>
+    
+    <para>
+     Default value for arguments passed by reference is supported since PHP 5.
+    </para>
 
    </sect2>
 
@@ -345,7 +349,7 @@ Making a bowl of acidophilus raspberry.
     <title>Variable-length argument lists</title>
 
     <simpara>
-     PHP 4 has support for variable-length argument lists in
+     PHP 4 and above has support for variable-length argument lists in
      user-defined functions. This is really quite easy, using the
      <function>func_num_args</function>,
      <function>func_get_arg</function>, and