diff --git a/fake_system_state.h b/fake_system_state.h
index 0e853c9..062cbbb 100644
--- a/fake_system_state.h
+++ b/fake_system_state.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_FAKE_SYSTEM_STATE_H_
-#define CHROMEOS_PLATFORM_UPDATE_ENGINE_FAKE_SYSTEM_STATE_H_
+#ifndef UPDATE_ENGINE_FAKE_SYSTEM_STATE_H_
+#define UPDATE_ENGINE_FAKE_SYSTEM_STATE_H_
 
 #include <base/logging.h>
 #include <gmock/gmock.h>
@@ -246,4 +246,4 @@
 
 }  // namespace chromeos_update_engine
 
-#endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_FAKE_SYSTEM_STATE_H_
+#endif  // UPDATE_ENGINE_FAKE_SYSTEM_STATE_H_