diff --git a/dev-ml/integers/integers-0.5.1.ebuild b/dev-ml/integers/integers-0.5.1.ebuild
index 6469a73853ee6..da2638bb67400 100644
--- a/dev-ml/integers/integers-0.5.1.ebuild
+++ b/dev-ml/integers/integers-0.5.1.ebuild
@@ -12,5 +12,5 @@ S="${WORKDIR}/ocaml-${P}"
 
 LICENSE="MIT"
 SLOT="0/${PV}"
-KEYWORDS="~amd64 ~arm ~arm64 ~ppc ~x86"
+KEYWORDS="~amd64 ~arm ~arm64 ~ppc ~ppc64 ~x86"
 IUSE="+ocamlopt"