diff -r bf810176ddb8 -r e5f4d8af567e ui/gtk/range.c
--- a/ui/gtk/range.c	Mon Feb 12 21:13:23 2024 +0100
+++ b/ui/gtk/range.c	Sun Jun 09 15:43:08 2024 +0200
@@ -61,6 +61,7 @@
         event->userdata = userdata;
         event->callback = f;
         event->value = 0;
+        event->customdata = NULL;
         
         g_signal_connect(
                 G_OBJECT(scrollbar),