diff --git a/reference/apache/functions/virtual.xml b/reference/apache/functions/virtual.xml
index f4dc2a69d6..dc7debcdb5 100644
--- a/reference/apache/functions/virtual.xml
+++ b/reference/apache/functions/virtual.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.8 $ -->
+<!-- $Revision: 1.9 $ -->
 <!-- splitted from ./en/functions/apache.xml, last change in rev 1.20 -->
   <refentry id="function.virtual">
    <refnamediv>
@@ -31,7 +31,8 @@
       since it uses the Apache API for doing sub requests. Query string can be
       passed to the included file but <varname>$_GET</varname> is copied from
       the parent script and only <varname>$_SERVER['QUERY_STRING']</varname> is
-      filled by the passed query string.
+      filled by the passed query string. Query string passing works only under
+      Apache 2. Requested file is not listed in Apache access log.
      </para>
     </warning>
     <para>