diff --git a/demos/gtk-demo/event_axes.c b/demos/gtk-demo/event_axes.c
index c2e0b424eb..ea8ed67a1f 100644
--- a/demos/gtk-demo/event_axes.c
+++ b/demos/gtk-demo/event_axes.c
@@ -408,6 +408,7 @@ do_event_axes (GtkWidget *toplevel)
 
       box = gtk_event_box_new ();
       gtk_container_add (GTK_CONTAINER (window), box);
+      gtk_widget_set_support_multidevice (box, TRUE);
       gtk_widget_add_events (box,
 			     GDK_POINTER_MOTION_MASK |
 			     GDK_BUTTON_PRESS_MASK |