diff --git a/dev-ruby/mail/mail-2.6.6.ebuild b/dev-ruby/mail/mail-2.6.6.ebuild
index eecab5c734acc..92549ed6702b0 100644
--- a/dev-ruby/mail/mail-2.6.6.ebuild
+++ b/dev-ruby/mail/mail-2.6.6.ebuild
@@ -21,7 +21,7 @@ SRC_URI="https://github.com/${GITHUB_USER}/mail/archive/${PV}.tar.gz -> ${P}-git
 
 LICENSE="MIT"
 SLOT="$(get_version_component_range 1-2)"
-KEYWORDS="~amd64 ~arm ~ppc ~ppc64 ~x86 ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris"
+KEYWORDS="~amd64 ~arm ~arm64 ~ppc ~ppc64 ~x86 ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris"
 IUSE=""
 
 ruby_add_rdepend "