diff --git a/features/safe-mode.xml b/features/safe-mode.xml
index 4788d0f3b8..2a6aba638c 100644
--- a/features/safe-mode.xml
+++ b/features/safe-mode.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.60 $ -->
+<!-- $Revision: 1.61 $ -->
  <chapter id="features.safe-mode">
   <title>Safe Mode</title>
 
@@ -145,6 +145,12 @@
         want to restrict access to only the specified directory, end with a 
         slash. For example: "safe_mode_include_dir = /dir/incl/"
        </simpara>
+       <simpara>
+        If the value of this directive is empty, no files with different
+        <literal>UID</literal>/<literal>GID</literal> can be included in
+        PHP 4.2.3 and as of PHP 4.3.3. In earlier versions, all files could be
+        included.
+       </simpara>
       </listitem>
      </varlistentry>
      <varlistentry id="ini.safe-mode-exec-dir">