--- a/ui/gtk/toolkit.h	Sun Jan 05 10:10:47 2025 +0100
+++ b/ui/gtk/toolkit.h	Sun Jan 05 10:14:52 2025 +0100
@@ -154,6 +154,9 @@
     void        *userdata;
 } UiVarEventData;
 
+typedef enum UiOrientation UiOrientation;
+enum UiOrientation { UI_HORIZONTAL = 0, UI_VERTICAL };
+
 #ifndef UI_GTK4
 struct UiSelection {
     GtkSelectionData *data;