--- ./gtk/gtkscale.c.old	2023-05-08 23:10:57.233054650 -0400
+++ ./gtk/gtkscale.c.old	2023-05-08 23:11:02.413989125 -0400
@@ -1469,11 +1469,11 @@ gtk_scale_add_mark (GtkScale        *sca
   mark->value = value;
   mark->markup = g_strdup (markup);
   mark->position = position;
  
   priv->marks = g_slist_insert_sorted_with_data (priv->marks, mark,
-                                                 (GCompareFunc) compare_marks,
+                                                 compare_marks,
                                                  GINT_TO_POINTER (
                                                    gtk_range_get_inverted (GTK_RANGE (scale)) 
                                                    ));
 
   n = g_slist_length (priv->marks);