diff --git a/gnu/packages/elixir.scm b/gnu/packages/elixir.scm
index 26120327f4..e154a2b2c1 100644
--- a/gnu/packages/elixir.scm
+++ b/gnu/packages/elixir.scm
@@ -4,7 +4,7 @@
 ;;; Copyright © 2016 Ricardo Wurmus <rekado@elephly.net>
 ;;; Copyright © 2017 nee <nee.git@cock.li>
 ;;; Copyright © 2018 Tobias Geerinckx-Rice <me@tobias.gr>
-;;; Copyright (C) 2018 Nils Gillmann <ng0@n0.is>
+;;; Copyright © 2018 Nils Gillmann <ng0@n0.is>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
diff --git a/gnu/packages/erlang.scm b/gnu/packages/erlang.scm
index 219fa5a0dc..da0916602f 100644
--- a/gnu/packages/erlang.scm
+++ b/gnu/packages/erlang.scm
@@ -3,7 +3,7 @@
 ;;; Copyright © 2016, 2017 Leo Famulari <leo@famulari.name>
 ;;; Copyright © 2016, 2017 Pjotr Prins <pjotr.guix@thebird.nl>
 ;;; Copyright © 2018 Tobias Geerinckx-Rice <me@tobias.gr>
-;;; Copyright (C) 2018 Nils Gillmann <ng0@n0.is>
+;;; Copyright © 2018 Nils Gillmann <ng0@n0.is>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
diff --git a/gnu/packages/marst.scm b/gnu/packages/marst.scm
index 9b4db8be63..92a32eba6c 100644
--- a/gnu/packages/marst.scm
+++ b/gnu/packages/marst.scm
@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright 2016 John Darrington <jmd@gnu.org>
+;;; Copyright © 2016 John Darrington <jmd@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;