diff --git a/dev-python/monotonic/monotonic-1.5-r1.ebuild b/dev-python/monotonic/monotonic-1.5-r1.ebuild
index 29daba27a01f0..e209da31034b3 100644
--- a/dev-python/monotonic/monotonic-1.5-r1.ebuild
+++ b/dev-python/monotonic/monotonic-1.5-r1.ebuild
@@ -12,7 +12,7 @@ SRC_URI="mirror://pypi/${PN:0:1}/${PN}/${P}.tar.gz"
 
 LICENSE="Apache-2.0"
 SLOT="0"
-KEYWORDS="amd64 arm arm64 ~hppa ~ia64 ppc ppc64 ~s390 sparc x86"
+KEYWORDS="amd64 arm arm64 ~hppa ~ia64 ppc ppc64 ~s390 sparc x86 ~x64-macos"
 IUSE=""
 
 # no tests