diff --git a/reference/filesystem/functions/realpath.xml b/reference/filesystem/functions/realpath.xml
index 5102443984..a417d87990 100644
--- a/reference/filesystem/functions/realpath.xml
+++ b/reference/filesystem/functions/realpath.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.7 $ -->
+<!-- $Revision: 1.8 $ -->
 <!-- splitted from ./en/functions/filesystem.xml, last change in rev 1.23 -->
   <refentry id="function.realpath">
    <refnamediv>
@@ -21,7 +21,9 @@
     </para>
     <para>
      <function>realpath</function> returns &false; on failure, e.g. if
-     the file does not exists.
+     the file does not exist. On BSD systems <function>realpath</function>
+     doesn't fail if only the last <parameter>path</parameter> component
+     doesn't exist, while other systems will return &false;.
     </para>
     <para>
      <example>