diff --git a/gnu/packages/mail.scm b/gnu/packages/mail.scm
index 0effaa16a2..57edc6f535 100644
--- a/gnu/packages/mail.scm
+++ b/gnu/packages/mail.scm
@@ -26,6 +26,7 @@
 ;;; Copyright © 2017 Rene Saavedra <rennes@openmailbox.org>
 ;;; Copyright © 2018 Pierre Langlois <pierre.langlois@gmx.com>
 ;;; Copyright © 2018 Alex Vong <alexvong1995@gmail.com>
+;;; Copyright © 2018 Gábor Boskovits <boskovits@gmail.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -81,6 +82,7 @@
   #:use-module (gnu packages m4)
   #:use-module (gnu packages ncurses)
   #:use-module (gnu packages openldap)
+  #:use-module (gnu packages onc-rpc)
   #:use-module (gnu packages pcre)
   #:use-module (gnu packages perl)
   #:use-module (gnu packages python)
@@ -1136,6 +1138,7 @@ delivery.")
        ("bzip2" ,bzip2)
        ("xz" ,xz)
        ("perl" ,perl)
+       ("libnsl" ,libnsl)
        ("libxt" ,libxt)
        ("libxaw" ,libxaw)))
     (native-inputs