diff --git a/buffet/dbus_utils.cc b/buffet/dbus_utils.cc
new file mode 100644
index 0000000..fcda628
--- /dev/null
+++ b/buffet/dbus_utils.cc
@@ -0,0 +1,23 @@
+// Copyright 2014 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.
+
+#include <base/logging.h>
+
+#include "buffet/dbus_utils.h"
+
+namespace buffet {
+
+namespace dbus_utils {
+
+scoped_ptr<dbus::Response> GetBadArgsError(dbus::MethodCall* method_call,
+                                           const std::string& message) {
+  LOG(ERROR) << "Error while handling DBus call: " << message;
+  scoped_ptr<dbus::ErrorResponse> resp(dbus::ErrorResponse::FromMethodCall(
+      method_call, "org.freedesktop.DBus.Error.InvalidArgs", message));
+  return scoped_ptr<dbus::Response>(resp.release());
+}
+
+}  // namespace dbus_utils
+
+}  // namespace buffet