diff --git a/dev-python/tox/tox-2.9.1.ebuild b/dev-python/tox/tox-2.9.1.ebuild
index 9a3650e727ee4..6238e8a7eb4aa 100644
--- a/dev-python/tox/tox-2.9.1.ebuild
+++ b/dev-python/tox/tox-2.9.1.ebuild
@@ -1,4 +1,4 @@
-# Copyright 1999-2017 Gentoo Foundation
+# Copyright 1999-2019 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=6
@@ -13,7 +13,7 @@ SRC_URI="mirror://pypi/${PN:0:1}/${PN}/${P}.tar.gz"
 
 LICENSE="MIT"
 SLOT="0"
-KEYWORDS="alpha amd64 arm arm64 hppa ia64 ~mips ppc ppc64 sparc x86 ~amd64-fbsd ~amd64-linux ~x86-linux"
+KEYWORDS="alpha amd64 arm arm64 hppa ia64 ~mips ppc ppc64 s390 sparc x86 ~amd64-fbsd ~amd64-linux ~x86-linux"
 
 IUSE="doc test"
 
diff --git a/dev-python/tox/tox-3.2.1.ebuild b/dev-python/tox/tox-3.2.1.ebuild
index 50ce564c0619b..955aad49484f1 100644
--- a/dev-python/tox/tox-3.2.1.ebuild
+++ b/dev-python/tox/tox-3.2.1.ebuild
@@ -1,4 +1,4 @@
-# Copyright 1999-2018 Gentoo Authors
+# Copyright 1999-2019 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
@@ -13,7 +13,7 @@ SRC_URI="mirror://pypi/${PN:0:1}/${PN}/${P}.tar.gz"
 
 LICENSE="MIT"
 SLOT="0"
-KEYWORDS="~alpha ~amd64 ~arm ~hppa ~ia64 ~mips ~ppc ~ppc64 ~sparc ~x86 ~amd64-linux ~x86-linux"
+KEYWORDS="~alpha ~amd64 ~arm ~hppa ~ia64 ~mips ~ppc ~ppc64 ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux"
 
 IUSE="doc test"