diff --git a/sci-mathematics/spin/spin-6.4.5.ebuild b/sci-mathematics/spin/spin-6.4.5.ebuild
index 010f2550a8746..27e6d71ece096 100644
--- a/sci-mathematics/spin/spin-6.4.5.ebuild
+++ b/sci-mathematics/spin/spin-6.4.5.ebuild
@@ -14,7 +14,7 @@ SRC_URI="http://spinroot.com/spin/Src/${MY_P}.tar.gz"
 
 LICENSE="BSD"
 SLOT="0"
-KEYWORDS="~amd64 ~x86"
+KEYWORDS="~amd64 ~riscv ~x86"
 IUSE="graphviz tk"
 
 DEPEND="sys-devel/bison"