diff --git a/buffet/device_registration_storage_keys.h b/buffet/device_registration_storage_keys.h
index d7946bc..40a88f9 100644
--- a/buffet/device_registration_storage_keys.h
+++ b/buffet/device_registration_storage_keys.h
@@ -26,6 +26,7 @@
 extern const char kDisplayName[];
 extern const char kDescription[];
 extern const char kLocation[];
+extern const char kModelId[];
 
 }  // namespace storage_keys
 }  // namespace buffet