diff --git a/extent_writer.h b/extent_writer.h
index 7f31979..db24b4b 100644
--- a/extent_writer.h
+++ b/extent_writer.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_EXTENT_WRITER_H_
-#define CHROMEOS_PLATFORM_UPDATE_ENGINE_EXTENT_WRITER_H_
+#ifndef UPDATE_ENGINE_EXTENT_WRITER_H_
+#define UPDATE_ENGINE_EXTENT_WRITER_H_
 
 #include <vector>
 #include "base/logging.h"
@@ -118,4 +118,4 @@
 
 }  // namespace chromeos_update_engine
 
-#endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_EXTENT_WRITER_H_
+#endif  // UPDATE_ENGINE_EXTENT_WRITER_H_