diff --git a/file_descriptor.h b/file_descriptor.h
index 391a650..21c2758 100644
--- a/file_descriptor.h
+++ b/file_descriptor.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_FILE_DESCRIPTOR_H_
-#define CHROMEOS_PLATFORM_UPDATE_ENGINE_FILE_DESCRIPTOR_H_
+#ifndef UPDATE_ENGINE_FILE_DESCRIPTOR_H_
+#define UPDATE_ENGINE_FILE_DESCRIPTOR_H_
 
 #include <errno.h>
 #include <sys/types.h>
@@ -119,4 +119,4 @@
 
 }  // namespace chromeos_update_engine
 
-#endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_FILE_DESCRIPTOR_H_
+#endif  // UPDATE_ENGINE_FILE_DESCRIPTOR_H_