diff --git a/dev-ml/duration/duration-0.1.3.ebuild b/dev-ml/duration/duration-0.1.3.ebuild
index 21c682e44c6c7..cfab3bd98bbff 100644
--- a/dev-ml/duration/duration-0.1.3.ebuild
+++ b/dev-ml/duration/duration-0.1.3.ebuild
@@ -11,7 +11,7 @@ SRC_URI="https://github.com/hannesm/duration/archive/${PV}.tar.gz -> ${P}.tar.gz
 
 LICENSE="ISC"
 SLOT="0/${PV}"
-KEYWORDS="amd64 arm arm64 ~ppc ppc64 x86"
+KEYWORDS="amd64 arm arm64 ~ppc ppc64 ~riscv x86"
 IUSE="+ocamlopt test"
 RESTRICT="!test? ( test )"