diff --git a/demos/gtk-demo/assistant.c b/demos/gtk-demo/assistant.c
index cf4eee6609..b1c285f0e8 100644
--- a/demos/gtk-demo/assistant.c
+++ b/demos/gtk-demo/assistant.c
@@ -179,7 +179,7 @@ do_assistant (GtkWidget *do_widget)
       gtk_window_set_display (GTK_WINDOW (assistant),
                               gtk_widget_get_display (do_widget));
       g_signal_connect (assistant, "destroy",
-                        G_CALLBACK (gtk_widget_destroyed), &window);
+                        G_CALLBACK (gtk_widget_destroyed), &assistant);
 
       create_page1 (assistant);
       create_page2 (assistant);