diff --git a/Doc/library/urllib2.rst b/Doc/library/urllib2.rst
index b8f2277..973c098 100644
--- a/Doc/library/urllib2.rst
+++ b/Doc/library/urllib2.rst
@@ -31,7 +31,8 @@
    *data* parameter is provided.  *data* should be a buffer in the standard
    :mimetype:`application/x-www-form-urlencoded` format.  The
    :func:`urllib.urlencode` function takes a mapping or sequence of 2-tuples and
-   returns a string in this format.
+   returns a string in this format. urllib2 module sends HTTP/1.1 requests with
+   `Connection:close` header included.
 
    The optional *timeout* parameter specifies a timeout in seconds for blocking
    operations like the connection attempt (if not specified, the global default