diff --git a/src/main/starlark/builtins_bzl/common/cc/cc_proto_library.bzl b/src/main/starlark/builtins_bzl/common/cc/cc_proto_library.bzl
index 042ee384ab1341..81e8df4be079cd 100644
--- a/src/main/starlark/builtins_bzl/common/cc/cc_proto_library.bzl
+++ b/src/main/starlark/builtins_bzl/common/cc/cc_proto_library.bzl
@@ -266,6 +266,7 @@ _cc_proto_aspect = aspect(
             default = configuration_field(fragment = "proto", name = "proto_toolchain_for_cc"),
         ),
         "_cc_toolchain": attr.label(default = "@bazel_tools//tools/cpp:current_cc_toolchain"),
+        "_cc_toolchain_type": attr.label(default = "@bazel_tools//tools/cpp:toolchain_type"),
     },
 )