diff -r d02e1149cdb9 -r 301d6c73087a ui/gtk/toolkit.h
--- a/ui/gtk/toolkit.h	Sun Sep 22 19:47:26 2024 +0200
+++ b/ui/gtk/toolkit.h	Sun Sep 22 21:17:15 2024 +0200
@@ -64,6 +64,7 @@
 #define SCROLLEDWINDOW_NEW() gtk_scrolled_window_new()
 #define SCROLLEDWINDOW_SET_CHILD(sw, child) gtk_scrolled_window_set_child(GTK_SCROLLED_WINDOW(sw), child)
 #define SCROLLEDWINDOW_GET_CHILD(sw) gtk_scrolled_window_get_child(GTK_SCROLLED_WINDOW(sw))
+#define WIDGET_ADD_CSS_CLASS(w, cssclass) gtk_widget_add_css_class(w, cssclass)
 #else
 #define WINDOW_SHOW(window) gtk_widget_show_all(window)
 #define WINDOW_DESTROY(window) gtk_widget_destroy(window)
@@ -74,6 +75,7 @@
 #define SCROLLEDWINDOW_NEW() gtk_scrolled_window_new(NULL, NULL)
 #define SCROLLEDWINDOW_SET_CHILD(sw, child) gtk_container_add(GTK_CONTAINER(sw), child)
 #define SCROLLEDWINDOW_GET_CHILD(sw) gtk_bin_get_child(GTK_BIN(sw))
+#define WIDGET_ADD_CSS_CLASS(w, cssclass) gtk_style_context_add_class(gtk_widget_get_style_context(w), cssclass)
 #endif
     
 #ifdef UI_GTK2