diff --git a/buffet/buffet.gyp b/buffet/buffet.gyp
index 3a62f13..7e5c71a 100644
--- a/buffet/buffet.gyp
+++ b/buffet/buffet.gyp
@@ -27,17 +27,18 @@
       'target_name': 'buffet_common',
       'type': 'static_library',
       'sources': [
+        'async_event_sequencer.cc',
         'data_encoding.cc',
         'dbus_constants.cc',
         'dbus_utils.cc',
         'device_registration_info.cc',
+        'error.cc',
         'exported_object_manager.cc',
         'exported_property_set.cc',
         'http_request.cc',
         'http_connection_curl.cc',
         'http_transport_curl.cc',
         'http_utils.cc',
-        'async_event_sequencer.cc',
         'manager.cc',
         'mime_utils.cc',
         'storage_impls.cc',
@@ -78,6 +79,7 @@
         'buffet_testrunner.cc',
         'data_encoding_unittest.cc',
         'device_registration_info_unittest.cc',
+        'error_unittest.cc',
         'exported_object_manager_unittest.cc',
         'exported_property_set_unittest.cc',
         'http_connection_fake.cc',