diff --git a/dbus_wrapper_interface.h b/dbus_wrapper_interface.h
index 9341174..51a268b 100644
--- a/dbus_wrapper_interface.h
+++ b/dbus_wrapper_interface.h
@@ -2,8 +2,8 @@
 // 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_DBUS_WRAPPER_H_
-#define CHROMEOS_PLATFORM_UPDATE_ENGINE_DBUS_WRAPPER_H_
+#ifndef CHROMEOS_PLATFORM_UPDATE_ENGINE_DBUS_WRAPPER_INTERFACE_H_
+#define CHROMEOS_PLATFORM_UPDATE_ENGINE_DBUS_WRAPPER_INTERFACE_H_
 
 // A mockable interface for DBus.
 
@@ -106,4 +106,4 @@
 
 }  // namespace chromeos_update_engine
 
-#endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_DBUS_WRAPPER_H_
+#endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_DBUS_WRAPPER_INTERFACE_H_