diff --git a/hwid_override.h b/hwid_override.h
new file mode 100644
index 0000000..8f8dbc6
--- /dev/null
+++ b/hwid_override.h
@@ -0,0 +1,33 @@
+// Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROMEOS_PLATFORM_UPDATE_ENGINE_HWID_OVERRIDE_H__
+#define CHROMEOS_PLATFORM_UPDATE_ENGINE_HWID_OVERRIDE_H__
+
+#include <map>
+#include <string>
+
+#include <base/basictypes.h>
+#include <base/file_path.h>
+
+namespace chromeos_update_engine {
+
+// Class that allows HWID to be read from <root>/etc/lsb-release.
+class HwidOverride {
+ public:
+  HwidOverride();
+  ~HwidOverride();
+
+  // Read HWID from an /etc/lsb-release file under given root.
+  // An empty string is returned if there is any error.
+  static std::string Read(const base::FilePath& root);
+
+  static const char kHwidOverrideKey[];
+ private:
+  DISALLOW_COPY_AND_ASSIGN(HwidOverride);
+};
+
+}  // namespace chromeos_update_engine
+
+#endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_HWID_OVERRIDE_H__