diff --git a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/package.accept_keywords b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/package.accept_keywords
index 182e207a40..303fa95476 100644
--- a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/package.accept_keywords
+++ b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/package.accept_keywords
@@ -7,6 +7,9 @@
 # Gentoo upstream package stabilisation
 # (the following packages are "unstable" upstream; we're stabilising these)
 
+# Keep versions on both arches in sync.
+=app-arch/xz-utils-5.4.6-r1 ~arm64
+
 # Needed by arm64-native SDK.
 =app-emulation/qemu-8.1.5 ~arm64