diff --git a/reference/filesystem/functions/file-exists.xml b/reference/filesystem/functions/file-exists.xml
index 8e235f233b..9604d1a049 100644
--- a/reference/filesystem/functions/file-exists.xml
+++ b/reference/filesystem/functions/file-exists.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.12 $ -->
+<!-- $Revision: 1.13 $ -->
 <!-- splitted from ./en/functions/filesystem.xml, last change in rev 1.2 -->
   <refentry id="function.file-exists">
    <refnamediv>
@@ -43,6 +43,16 @@ if (file_exists($filename)) {
     &note.clearstatcache;
 
     &tip.fopen-wrapper.stat;
+    
+    <warning>
+     <para>
+      This function returns &false; for files inaccessible due to <link
+      linkend="features.safe-mode">safe mode</link> retrictions. However these
+      files still can be <link linkend="function.include">included</link> if
+      they are located in <link
+      linkend="ini.safe-mode-include-dir">safe_mode_include_dir</link>.
+     </para>
+    </warning>
 
     <para>
      See also <function>is_readable</function>, <function>is_writable</function>,