1diff --git a/bazel/copts.bzl b/bazel/copts.bzl 2index 10be944f25..879518b92f 100644 3--- a/bazel/copts.bzl 4+++ b/bazel/copts.bzl 5@@ -59,4 +59,7 @@ GRPC_LLVM_WARNING_FLAGS = [ 6 GRPC_DEFAULT_COPTS = select({ 7 "//:use_strict_warning": GRPC_LLVM_WARNING_FLAGS + ["-DUSE_STRICT_WARNING=1"], 8 "//conditions:default": [], 9-}) 10+}) + select({ 11+ "@bazel_tools//src/conditions:windows": ["/std:c++14"], 12+ "//conditions:default": ["-std=c++14"], 13+}) 14