diff --git a/error_code.h b/error_code.h
index a9bfc2d..567534a 100644
--- a/error_code.h
+++ b/error_code.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_ERROR_CODE_H_
-#define CHROMEOS_PLATFORM_UPDATE_ENGINE_ERROR_CODE_H_
+#ifndef UPDATE_ENGINE_ERROR_CODE_H_
+#define UPDATE_ENGINE_ERROR_CODE_H_
 
 #include <ostream>  // NOLINT(readability/streams)
 
@@ -118,4 +118,4 @@
 
 }  // namespace chromeos_update_engine
 
-#endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_ERROR_CODE_H_
+#endif  // UPDATE_ENGINE_ERROR_CODE_H_