diff -r 7ada3db4cfa8 -r 9af327d0e0e4 ui/gtk/toolkit.h
--- a/ui/gtk/toolkit.h	Fri Jun 14 18:24:31 2024 +0200
+++ b/ui/gtk/toolkit.h	Sun Jun 16 11:36:27 2024 +0200
@@ -55,9 +55,11 @@
     void        *userdata;
 } UiVarEventData;
 
+#ifndef UI_GTK4
 struct UiSelection {
     GtkSelectionData *data;
 };
+#endif
 
 typedef enum UiOrientation UiOrientation;
 enum UiOrientation { UI_HORIZONTAL = 0, UI_VERTICAL };