diff -r 6b029c2c41ef -r 8fb6f9ed4ea9 Doc/library/imaplib.rst
--- a/Doc/library/imaplib.rst	Sat Nov 29 18:12:58 2008 +0100
+++ b/Doc/library/imaplib.rst	Sat Nov 29 18:15:55 2008 +0100
@@ -408,6 +408,10 @@
 
    Returns socket instance used to connect to server.
 
+.. method:: IMAP4.starttls([keyfile[, certfile]])
+
+   Starts a TLS session on the active connection as specified in RFC 2595. It's
+   only allowed before authenticating.
 
 .. method:: IMAP4.sort(sort_criteria, charset, search_criterion[, ...])