diff --git a/dev-ruby/actionmailer/actionmailer-4.2.8.ebuild b/dev-ruby/actionmailer/actionmailer-4.2.8.ebuild
index e11e1fb0a4234..84caccdae633c 100644
--- a/dev-ruby/actionmailer/actionmailer-4.2.8.ebuild
+++ b/dev-ruby/actionmailer/actionmailer-4.2.8.ebuild
@@ -17,7 +17,7 @@ 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 ~arm ~ppc ~ppc64 ~x86 ~amd64-linux"
+KEYWORDS="~amd64 ~arm ~arm64 ~ppc ~ppc64 ~x86 ~amd64-linux"
 IUSE=""
 
 RUBY_S="rails-${PV}/${PN}"