diff --git a/offlineimap.conf b/offlineimap.conf
index e1731a2..07f9901 100644
--- a/offlineimap.conf
+++ b/offlineimap.conf
@@ -637,11 +637,14 @@ remotehost = examplehost
 
 # This option stands in the [Repository RemoteExample] section.
 #
-# Set SSL version tu use (optional).
+# Set SSL version to use (optional).
 #
 # It is best to leave this unset, in which case the correct version will be
 # automatically detected. In rare cases, it may be necessary to specify a
-# particular version from: tls1, ssl2, ssl3, ssl23 (SSLv2 or SSLv3).
+# particular version from: tls1, ssl2, ssl3, ssl23.
+#
+# ssl23 is the highest protocol version that both the client and server support.
+# Despite the name, this option can select “TLS” protocols as well as “SSL”.
 #
 # See the configuration option tls_level to automatically disable insecure
 # protocols.