diff --git a/dev-ruby/certificate_authority/certificate_authority-0.1.6.ebuild b/dev-ruby/certificate_authority/certificate_authority-0.1.6.ebuild
index 2f3c16f2cea32..1bff572867ef7 100644
--- a/dev-ruby/certificate_authority/certificate_authority-0.1.6.ebuild
+++ b/dev-ruby/certificate_authority/certificate_authority-0.1.6.ebuild
@@ -17,7 +17,7 @@ HOMEPAGE="https://github.com/cchandler/certificate_authority"
 
 LICENSE="MIT"
 SLOT="0"
-KEYWORDS="~amd64 ~ppc64 ~x86"
+KEYWORDS="~amd64 ~arm ~ppc64 ~x86"
 IUSE=""
 
 ruby_add_rdepend ">=dev-ruby/activemodel-3.0.6:*"