--- a/ui/server/widget.h	Fri Dec 12 11:38:47 2025 +0100
+++ b/ui/server/widget.h	Fri Dec 12 12:00:34 2025 +0100
@@ -31,11 +31,13 @@
 
 #include "../ui/widget.h"
 
+#include <cx/buffer.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-
+void ui_serialize_type_obj_id(UiWidget *w, CxBuffer *buf);
 
 
 #ifdef __cplusplus