--- a/ui/cocoa/toolkit.h	Sun Oct 19 21:20:08 2025 +0200
+++ b/ui/cocoa/toolkit.h	Mon Nov 10 21:52:51 2025 +0100
@@ -31,10 +31,10 @@
 #include "../common/context.h"
 #include "../common/object.h"
 
-@interface UiAppCallback : NSObject {
-    ui_threadfunc callback;
-    void          *userdata;
-}
+@interface UiAppCallback : NSObject
+
+@property    ui_threadfunc callback;
+@property    void          *userdata;
 
 - (id) initWithCallback:(ui_threadfunc)func userdata:(void*)userdata;