diff --git a/widget.proto b/widget.proto
index 8b85a33..ebe3f97 100644
--- a/widget.proto
+++ b/widget.proto
@@ -35,7 +35,7 @@ message Widget {
                                                  // string                color        = 5;
 }
 
-message Widgets {
+message Widgets {                                // `autogenpb:marshal`
         string                uuid         = 1;  // `autogenpb:uuid:0331fcd7-3c8c-43e4-be1b-77db6a6bc58c`
         string                version      = 2;  // `autogenpb:version:v1`
         repeated Widget       Widgets      = 3;