diff --git a/chapters/config.xml b/chapters/config.xml
index 750f4bc3e1..abec0ddaf5 100644
--- a/chapters/config.xml
+++ b/chapters/config.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.36 $ -->
+<!-- $Revision: 1.37 $ -->
  <chapter id="configuration">
   <title>Configuration</title>
 
@@ -368,6 +368,14 @@ include_path = ".;c:\php\lib"
          module, open_basedir paths from parent directories are now
          automatically inherited.
         </para>
+	<para>
+	 The restriction specified with open_basedir is actually a
+	 prefix, not a directory name.  This means that "open_basedir =
+	 /dir/incl" also allows access to "/dir/include" and
+	 "/dir/incls" if they exist.  When you want to restrict access to
+	 only the specified directory, end with a slash.  For example:
+	 "open_basedir = /dir/incl/"
+	</para>
         <note>
          <para>Support for multiple directories was added in 3.0.7.</para>
         </note>