diff --git a/gnu/packages.scm b/gnu/packages.scm
index 272a7628c16a6059ec498831b66881785e85f1c8..307f21f057e4af25168220b9d8e57b0a10ac40f4 100644
--- a/gnu/packages.scm
+++ b/gnu/packages.scm
@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2012, 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2012, 2013, 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2013 Mark H Weaver <mhw@netris.org>
 ;;; Copyright © 2014 Eric Bavier <bavier@member.fsf.org>
 ;;; Copyright © 2016 Alex Kost <alezost@gmail.com>
@@ -291,7 +291,8 @@ (define* (%find-package spec name version #:key fallback?)
                 (package-full-name pkg)
                 (location->string (package-location pkg))))
      (when fallback?
-       (warning (_ "deprecated NAME-VERSION syntax.~%")))
+       (warning (_ "deprecated NAME-VERSION syntax; \
+use NAME@VERSION instead~%")))
      pkg)
     (_
      (if version