diff --git a/gnu/services/pam-mount.scm b/gnu/services/pam-mount.scm
index 8a38d6b1cc..dbb9d0285f 100644
--- a/gnu/services/pam-mount.scm
+++ b/gnu/services/pam-mount.scm
@@ -1,5 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2019 Guillaume Le Vaillant <glv@posteo.net>
+;;; Copyright © 2023 Brian Cully <bjc@spork.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -220,4 +221,6 @@ (define pam-mount-volume-service-type
                 (extend append)
                 (default-value '())
                 (description
-                 "Volumes to be mounted during PAM-assisted login.")))
+                 "Mount remote volumes such as CIFS shares @i{via}
+@acronym{PAM, Pluggable Authentication Modules} when logging in, using login
+credentials.")))