diff --git a/sdk_container/src/third_party/portage-stable/dev-libs/protobuf/protobuf-27.2.ebuild b/sdk_container/src/third_party/portage-stable/dev-libs/protobuf/protobuf-27.2.ebuild
index d9b11f9f0d..e6c26cbfee 100644
--- a/sdk_container/src/third_party/portage-stable/dev-libs/protobuf/protobuf-27.2.ebuild
+++ b/sdk_container/src/third_party/portage-stable/dev-libs/protobuf/protobuf-27.2.ebuild
@@ -18,7 +18,7 @@ if [[ "${PV}" == *9999 ]]; then
 	inherit git-r3
 else
 	SRC_URI="https://github.com/protocolbuffers/protobuf/archive/v${PV}.tar.gz -> ${P}.tar.gz"
-	KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~loong ~mips ~ppc64 ~riscv ~sparc ~x86 ~amd64-linux ~x86-linux ~x64-macos"
+	KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~loong ~mips ~ppc64 ~riscv ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux ~x64-macos"
 	MY_SLOT=$(ver_cut 1-2)
 fi