diff --git a/dev-python/pyserial/pyserial-3.2.1.ebuild b/dev-python/pyserial/pyserial-3.2.1.ebuild
index bcab615ab74a7..7cc47ed7da1f1 100644
--- a/dev-python/pyserial/pyserial-3.2.1.ebuild
+++ b/dev-python/pyserial/pyserial-3.2.1.ebuild
@@ -12,7 +12,7 @@ SRC_URI="mirror://pypi/${PN:0:1}/${PN}/${P}.tar.gz"
 
 LICENSE="PSF-2"
 SLOT="0"
-KEYWORDS="alpha amd64 arm arm64 hppa ia64 ~m68k ~mips ppc ppc64 ~s390 ~sh sparc x86 ~amd64-fbsd ~x86-fbsd"
+KEYWORDS="alpha amd64 arm arm64 hppa ia64 ~m68k ~mips ppc ppc64 s390 ~sh sparc x86 ~amd64-fbsd ~x86-fbsd"
 IUSE="doc examples"
 
 DEPEND="