diff --git a/docs/configuration.rst b/docs/configuration.rst
index 089fbbd97..8abcb5d76 100644
--- a/docs/configuration.rst
+++ b/docs/configuration.rst
@@ -30,7 +30,7 @@ base directory.
 
 The main file is named "``tahoe.cfg``", and is an "`.INI`_"-style configuration
 file (parsed by the Python stdlib `ConfigParser`_ module: "``[name]``" section
-markers, lines with "``key.subkey: value``", rfc822-style
+markers, lines with "``key.subkey: value``", `RFC822-style`_
 continuations). There are also other files containing information that does
 not easily fit into this format. The "``tahoe create-node``" or "``tahoe
 create-client``" command will create an initial ``tahoe.cfg`` file for
@@ -67,6 +67,7 @@ The item descriptions below use the following types:
 
 .. _.INI: https://en.wikipedia.org/wiki/INI_file
 .. _ConfigParser: https://docs.python.org/2/library/configparser.html
+.. _RFC822-style: https://www.ietf.org/rfc/rfc0822
 .. _the Twisted strports documentation: https://twistedmatrix.com/documents/current/api/twisted.application.strports.html
 .. _the Twisted Endpoints documentation: http://twistedmatrix.com/documents/current/core/howto/endpoints.html#endpoint-types-included-with-twisted