diff --git a/gnu/packages/game-development.scm b/gnu/packages/game-development.scm
index 697ede89e1..23cf913644 100644
--- a/gnu/packages/game-development.scm
+++ b/gnu/packages/game-development.scm
@@ -15,7 +15,7 @@
 ;;; Copyright © 2017, 2019 Rutger Helling <rhelling@mykolab.com>
 ;;; Copyright © 2018 Marius Bakke <mbakke@fastmail.com>
 ;;; Copyright © 2019 Pierre Neidhardt <mail@ambrevar.xyz>
-;;; Copyright © 2019 Leo Prikler <leo.prikler@student.tugraz.at>
+;;; Copyright © 2019, 2020 Leo Prikler <leo.prikler@student.tugraz.at>
 ;;; Copyright © 2019 Jethro Cao <jethrocao@gmail.com>
 ;;; Copyright © 2020 Nicolas Goaziou <mail@nicolasgoaziou.fr>
 ;;;