diff --git a/XMPP.md b/XMPP.md
index 51d95100..beb53084 100644
--- a/XMPP.md
+++ b/XMPP.md
@@ -1,5 +1,5 @@
 # <img src="https://yunohost.org/images/XMPP_logo.png" width=100>
-XMPP is a communication protocol of instant messaging, VoIP (Voice over IP), videoconferencing.
+<abbr title="Extensible Messaging and Presence Protocol">XMPP</abbr> is a communication protocol of instant messaging, VoIP (Voice over IP), videoconferencing.
 
 YunoHost provide:
 * [Metronome](http://www.lightwitch.org/metronome): a XMPP server