diff --git a/doc/apps/s_client.pod b/doc/apps/s_client.pod
index e8cc8712d2046d52d1e2e2d709c5b8b064e41d2d..1c50836a8a76c00452fe5b1bc54f12b96b510adc 100644
--- a/doc/apps/s_client.pod
+++ b/doc/apps/s_client.pod
@@ -223,7 +223,7 @@ command for more information.
 
 send the protocol-specific message(s) to switch to TLS for communication.
 B<protocol> is a keyword for the intended protocol.  Currently, the only
-supported keywords are "smtp", "pop3", "imap", and "ftp".
+supported keywords are "smtp", "pop3", "imap", "ftp" and "xmpp".
 
 =item B<-tlsextdebug>