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 a97a0e6783..f7782b9f15 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
@@ -88,3 +88,6 @@
 
 # Accept unstable host Rust compilers.
 =virtual/rust-1.70.0 ~amd64 ~arm64
+
+# Keep versions on both arches in sync.
+=x11-base/xorg-proto-2023.2 ~amd64