diff --git a/chapters/config.xml b/chapters/config.xml
index c9e3564005..a5a3e87bf5 100644
--- a/chapters/config.xml
+++ b/chapters/config.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.46 $ -->
+<!-- $Revision: 1.47 $ -->
  <chapter id="configuration">
   <title>Configuration</title>
 
@@ -635,6 +635,28 @@ include_path=".;c:\www\phplib"
        </listitem>
       </varlistentry>
 
+      <varlistentry id="ini.post_max_size">
+       <term>
+        <parameter>post_max_size</parameter>
+        <type>integer</type>
+       </term>
+       <listitem>
+        <simpara>
+         Sets max size of post data allowed. This setting also affects
+         file upload. To upload large files, this value must be larger
+         than <link linkend="upload-max-filesize">upload_max_filesize</link>.
+	</simpara>
+        <simpara>
+         If memory limit is enabled by configure script, <link
+         linkend="ini.memory-limit">memory_limit</link> also affects
+         file uploading. Generally speaking, <link
+         linkend="ini.memory-limit">memory_limit</link> should be
+         larger than <link
+         linkend="ini.post-max-size">post_max_size</link>.
+        </simpara>
+       </listitem>
+      </varlistentry>
+
       <varlistentry id="ini.register-globals">
        <term>
         <parameter>register_globals</parameter>
diff --git a/features/file-upload.xml b/features/file-upload.xml
index 8257093396..062349e50b 100644
--- a/features/file-upload.xml
+++ b/features/file-upload.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.36 $ -->
+<!-- $Revision: 1.37 $ -->
  <chapter id="features.file-upload">
   <title>Handling file uploads</title>
 
@@ -243,8 +243,8 @@ move_uploaded_file($HTTP_POST_FILES['userfile']['tmp_name'], "/place/to/put/uplo
     sure to set <literal>max_execution_time</literal> large enough.
    </simpara>
    <simpara>
-    If <literal>post_max_size</literal> is set too small, large files
-    cannot be uploaded.  Make sure to set
+    If <link linkend="ini.post-max-size">post_max_size</link> set too
+    small, large files cannot be uploaded.  Make sure to set
     <literal>post_max_size</literal> large enough.
    </simpara>
    <simpara>