diff --git a/CPPLINT.cfg b/CPPLINT.cfg
index 3dd0f35..259fb2f 100644
--- a/CPPLINT.cfg
+++ b/CPPLINT.cfg
@@ -1,3 +1,7 @@
 # This should be kept in sync with platform2/CPPLINT.cfg
 set noparent
-filter=-build/include_order,+build/include_alpha,-build/header_guard
+
+# Header guard should start with UPDATE_ENGINE_
+root=..
+
+filter=-build/include_order,+build/include_alpha
diff --git a/client_library/include/update_engine/status_update_handler.h b/client_library/include/update_engine/status_update_handler.h
index d5b8cdb..d2fad34 100644
--- a/client_library/include/update_engine/status_update_handler.h
+++ b/client_library/include/update_engine/status_update_handler.h
@@ -14,8 +14,8 @@
 // limitations under the License.
 //
 
-#ifndef UPDATE_ENGINE_CLIENT_LIBRARY_INCLUDE_STATUS_UPDATE_HANDLER_H_
-#define UPDATE_ENGINE_CLIENT_LIBRARY_INCLUDE_STATUS_UPDATE_HANDLER_H_
+#ifndef UPDATE_ENGINE_CLIENT_LIBRARY_INCLUDE_UPDATE_ENGINE_STATUS_UPDATE_HANDLER_H_
+#define UPDATE_ENGINE_CLIENT_LIBRARY_INCLUDE_UPDATE_ENGINE_STATUS_UPDATE_HANDLER_H_
 
 #include <string>
 
@@ -44,4 +44,4 @@
 
 }  // namespace update_engine
 
-#endif  // UPDATE_ENGINE_CLIENT_LIBRARY_INCLUDE_STATUS_UPDATE_HANDLER_H_
+#endif  // UPDATE_ENGINE_CLIENT_LIBRARY_INCLUDE_UPDATE_ENGINE_STATUS_UPDATE_HANDLER_H_
diff --git a/mock_metrics_reporter.h b/mock_metrics_reporter.h
index a0f164b..c35a105 100644
--- a/mock_metrics_reporter.h
+++ b/mock_metrics_reporter.h
@@ -14,8 +14,8 @@
 // limitations under the License.
 //
 
-#ifndef UPDATE_ENGINE_MOCK_METRICS_REPORTER_H
-#define UPDATE_ENGINE_MOCK_METRICS_REPORTER_H
+#ifndef UPDATE_ENGINE_MOCK_METRICS_REPORTER_H_
+#define UPDATE_ENGINE_MOCK_METRICS_REPORTER_H_
 
 #include <gmock/gmock.h>
 
@@ -80,4 +80,4 @@
 
 }  // namespace chromeos_update_engine
 
-#endif  // UPDATE_ENGINE_MOCK_METRICS_REPORTER_H
+#endif  // UPDATE_ENGINE_MOCK_METRICS_REPORTER_H_
diff --git a/parcelable_update_engine_status.h b/parcelable_update_engine_status.h
index 82006e4..3feac76 100644
--- a/parcelable_update_engine_status.h
+++ b/parcelable_update_engine_status.h
@@ -14,8 +14,8 @@
 // limitations under the License.
 //
 
-#ifndef UPDATE_ENGINE_UPDATE_ENGINE_STATUS_H_
-#define UPDATE_ENGINE_UPDATE_ENGINE_STATUS_H_
+#ifndef UPDATE_ENGINE_PARCELABLE_UPDATE_ENGINE_STATUS_H_
+#define UPDATE_ENGINE_PARCELABLE_UPDATE_ENGINE_STATUS_H_
 
 #include <binder/Parcelable.h>
 #include <utils/String16.h>
@@ -60,4 +60,4 @@
 }  // namespace brillo
 }  // namespace android
 
-#endif  // UPDATE_ENGINE_UPDATE_ENGINE_STATUS_H_
+#endif  // UPDATE_ENGINE_PARCELABLE_UPDATE_ENGINE_STATUS_H_
diff --git a/power_manager_chromeos.h b/power_manager_chromeos.h
index ad49889..eeb14d8 100644
--- a/power_manager_chromeos.h
+++ b/power_manager_chromeos.h
@@ -14,8 +14,8 @@
 // limitations under the License.
 //
 
-#ifndef UPDATE_ENGINE_POWER_MANAGER_H_
-#define UPDATE_ENGINE_POWER_MANAGER_H_
+#ifndef UPDATE_ENGINE_POWER_MANAGER_CHROMEOS_H_
+#define UPDATE_ENGINE_POWER_MANAGER_CHROMEOS_H_
 
 #include <base/macros.h>
 #include <power_manager/dbus-proxies.h>
@@ -41,4 +41,4 @@
 
 }  // namespace chromeos_update_engine
 
-#endif  // UPDATE_ENGINE_POWER_MANAGER_H_
+#endif  // UPDATE_ENGINE_POWER_MANAGER_CHROMEOS_H_
diff --git a/update_manager/interactive_update_policy_impl.h b/update_manager/interactive_update_policy_impl.h
index a431456..18cf565 100644
--- a/update_manager/interactive_update_policy_impl.h
+++ b/update_manager/interactive_update_policy_impl.h
@@ -46,4 +46,4 @@
 
 }  // namespace chromeos_update_manager
 
-#endif  // UPDATE_ENGINE_UPDATE_MANAGER_OFFICIAL_BUILD_CHECK_POLICY_IMPL_H_
+#endif  // UPDATE_ENGINE_UPDATE_MANAGER_INTERACTIVE_UPDATE_POLICY_IMPL_H_