diff --git a/buffet/dbus_conversion.h b/buffet/dbus_conversion.h
new file mode 100644
index 0000000..20c3f58
--- /dev/null
+++ b/buffet/dbus_conversion.h
@@ -0,0 +1,26 @@
+// Copyright 2015 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 BUFFET_DBUS_CONVERSION_H_
+#define BUFFET_DBUS_CONVERSION_H_
+
+#include <base/values.h>
+#include <chromeos/any.h>
+#include <chromeos/errors/error.h>
+#include <chromeos/variant_dictionary.h>
+
+namespace buffet {
+
+// Converts DictionaryValue to D-Bus variant dictionary.
+chromeos::VariantDictionary DictionaryToDBusVariantDictionary(
+    const base::DictionaryValue& object);
+
+// Converts D-Bus variant dictionary to DictionaryValue.
+std::unique_ptr<base::DictionaryValue> DictionaryFromDBusVariantDictionary(
+    const chromeos::VariantDictionary& object,
+    chromeos::ErrorPtr* error);
+
+}  // namespace buffet
+
+#endif  // BUFFET_DBUS_CONVERSION_H_