diff --git a/dev-cpp/prometheus-cpp/prometheus-cpp-1.2.4.ebuild b/dev-cpp/prometheus-cpp/prometheus-cpp-1.2.4.ebuild
index 5aac6bae234aa..12939dda434ac 100644
--- a/dev-cpp/prometheus-cpp/prometheus-cpp-1.2.4.ebuild
+++ b/dev-cpp/prometheus-cpp/prometheus-cpp-1.2.4.ebuild
@@ -11,7 +11,7 @@ SRC_URI="https://github.com/jupp0r/${PN}/archive/v${PV}.tar.gz -> ${P}.tar.gz"
 
 LICENSE="MIT"
 SLOT="0"
-KEYWORDS="amd64 ~riscv x86"
+KEYWORDS="amd64 ~arm64 ~riscv x86"
 IUSE="test zlib"
 
 RESTRICT="!test? ( test )"