diff --git a/dev-cpp/eigen/eigen-3.3.9.ebuild b/dev-cpp/eigen/eigen-3.3.9.ebuild
index 1577b712187c2..930091236989d 100644
--- a/dev-cpp/eigen/eigen-3.3.9.ebuild
+++ b/dev-cpp/eigen/eigen-3.3.9.ebuild
@@ -12,7 +12,7 @@ SRC_URI="https://gitlab.com/lib${PN}/${PN}/-/archive/${PV}/${P}.tar.gz"
 
 LICENSE="MPL-2.0"
 SLOT="3"
-KEYWORDS="amd64 ~arm arm64 ppc ppc64 ~sparc x86 ~amd64-linux ~x86-linux"
+KEYWORDS="amd64 ~arm arm64 ppc ppc64 ~riscv ~sparc x86 ~amd64-linux ~x86-linux"
 IUSE="cpu_flags_arm_neon cpu_flags_ppc_altivec cpu_flags_ppc_vsx cuda debug doc openmp test" #zvector
 
 RESTRICT="!test? ( test )"