diff --git a/dev-ruby/activemodel/activemodel-5.1.2.ebuild b/dev-ruby/activemodel/activemodel-5.1.2.ebuild
index 577803789c953..cf872504ad728 100644
--- a/dev-ruby/activemodel/activemodel-5.1.2.ebuild
+++ b/dev-ruby/activemodel/activemodel-5.1.2.ebuild
@@ -21,7 +21,7 @@ SRC_URI="https://github.com/rails/rails/archive/v${PV}.tar.gz -> rails-${PV}.tgz
 
 LICENSE="MIT"
 SLOT="$(get_version_component_range 1-2)"
-KEYWORDS="~amd64 ~arm64 ~amd64-linux"
+KEYWORDS="~amd64 ~arm ~arm64 ~amd64-linux"
 IUSE=""
 
 RUBY_S="rails-${PV}/${PN}"