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diff --git a/src/rocksdb/port/win/env_default.cc b/src/rocksdb/port/win/env_default.cc
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+// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
+// This source code is licensed under both the GPLv2 (found in the
+// COPYING file in the root directory) and Apache 2.0 License
+// (found in the LICENSE.Apache file in the root directory).
+//
+// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file. See the AUTHORS file for names of contributors.
+
+#if defined(OS_WIN)
+
+#include <mutex>
+
+#include "port/win/env_win.h"
+#include "rocksdb/env.h"
+#include "test_util/sync_point.h"
+#include "util/compression_context_cache.h"
+#include "util/thread_local.h"
+
+namespace ROCKSDB_NAMESPACE {
+namespace port {
+
+// We choose not to destroy the env because joining the threads from the
+// system loader
+// which destroys the statics (same as from DLLMain) creates a system loader
+// dead-lock.
+// in this manner any remaining threads are terminated OK.
+namespace {
+std::once_flag winenv_once_flag;
+Env* envptr;
+}; // namespace
+} // namespace port
+
+Env* Env::Default() {
+ ThreadLocalPtr::InitSingletons();
+ CompressionContextCache::InitSingleton();
+ INIT_SYNC_POINT_SINGLETONS();
+ std::call_once(port::winenv_once_flag,
+ []() { port::envptr = new port::WinEnv(); });
+ return port::envptr;
+}
+
+} // namespace ROCKSDB_NAMESPACE
+
+#endif