diff --git a/uv/private/markers/BUILD.bazel b/uv/private/markers/BUILD.bazel
index 2c8a73ccd..b2e7f28e1 100644
--- a/uv/private/markers/BUILD.bazel
+++ b/uv/private/markers/BUILD.bazel
@@ -90,6 +90,8 @@ configurable_string(
     value = select({
         "@platforms//cpu:x86_64": "x86_64",
         "@platforms//cpu:aarch64": "aarch64",
+        "@platforms//cpu:arm64": "arm64",
+        "//conditions:default": "unknown",
     }),
     visibility = ["//visibility:public"],
 )