diff --git a/gnu/services/messaging.scm b/gnu/services/messaging.scm
index 80ffed0f2f..8ab1481f61 100644
--- a/gnu/services/messaging.scm
+++ b/gnu/services/messaging.scm
@@ -691,7 +691,9 @@ (define prosody-service-type
                        (service-extension account-service-type
                                           (const %prosody-accounts))
                        (service-extension activation-service-type
-                                          prosody-activation)))))
+                                          prosody-activation)))
+                (description
+                 "Run Prosody, a modern XMPP communication server.")))
 
 ;; A little helper to make it easier to document all those fields.
 (define (generate-documentation)