--- a/mpv_gtk.c	2018-02-19 13:22:50.000000000 +0100
+++ b/mpv_gtk.c	2024-12-03 15:29:07.578801575 +0100
@@ -517,7 +517,7 @@
 
 #if CONFOPT_GTK == 3
     case GDK_SCROLL_SMOOTH:
-        gdk_event_get_scroll_deltas(event, &dx, &dy);
+        gdk_event_get_scroll_deltas((GdkEvent *)event, &dx, &dy);
 
         if (dy > 0)
             ptr = L"mouse-wheel-down";