diff --git a/cc/private/toolchain/windows_cc_toolchain_config.bzl b/cc/private/toolchain/windows_cc_toolchain_config.bzl
index 5d0d40feb..91eb08cbf 100644
--- a/cc/private/toolchain/windows_cc_toolchain_config.bzl
+++ b/cc/private/toolchain/windows_cc_toolchain_config.bzl
@@ -1027,6 +1027,9 @@ def _impl(ctx):
                         ACTION_NAMES.objcpp_compile,
                     ],
                     flag_groups = [
+                        flag_group(
+                            flags = ["/external:W0"],
+                        ),
                         flag_group(
                             flags = ["/external:I%{external_include_paths}"],
                             iterate_over = "external_include_paths",