diff --git a/features/http-auth.xml b/features/http-auth.xml
index 859b6358bd..561d4b6fce 100644
--- a/features/http-auth.xml
+++ b/features/http-auth.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.40 $ -->
+<!-- $Revision: 1.41 $ -->
  <chapter id="features.http-auth">
   <title>HTTP authentication with PHP</title>
 
@@ -163,11 +163,11 @@
    should be left unchecked.
   </simpara>
   <simpara>
-   Another limitation is if you're using the IIS module (ISAPI), you may not
-   use the <literal>PHP_AUTH_*</literal> variables but instead, the variable
-   <literal>HTTP_AUTHORIZATION</literal> is available.  For example, consider
-   the following code: <literal>list($user, $pw) = explode(':',  
-   base64_decode(substr($_SERVER['HTTP_AUTHORIZATION'], 6)));</literal>
+   Another limitation is if you're using the IIS module (ISAPI) and PHP 4, you
+   may not use the <literal>PHP_AUTH_*</literal> variables but instead, the
+   variable <literal>HTTP_AUTHORIZATION</literal> is available.  For example,
+   consider the following code: <literal>list($user, $pw) = explode(':',
+    base64_decode(substr($_SERVER['HTTP_AUTHORIZATION'], 6)));</literal>
   </simpara>
   <note>
    <title>IIS Note:</title>