diff --git a/features/remote-files.xml b/features/remote-files.xml
index 8d424d8591..29821c62a5 100644
--- a/features/remote-files.xml
+++ b/features/remote-files.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.27 $ -->
+<!-- $Revision: 1.28 $ -->
  <chapter xml:id="features.remote-files" xmlns="http://docbook.org/ns/docbook">
   <title>Using remote files</title>
 
@@ -10,7 +10,8 @@
    that take a filename as a parameter.  In addition, URLs can be
    used with the <function>include</function>,
    <function>include_once</function>, <function>require</function> and
-   <function>require_once</function> statements.
+   <function>require_once</function> statements (since PHP 5.2.0,
+   (<option>allow_url_include</option> must be enabled for these).
    See <xref linkend="wrappers"/> for more information about the protocols
    supported by PHP.
   </para>