diff --git a/demos/gtk-demo/ui_manager.c b/demos/gtk-demo/ui_manager.c
index 76ea246c76..293fd10885 100644
--- a/demos/gtk-demo/ui_manager.c
+++ b/demos/gtk-demo/ui_manager.c
@@ -205,7 +205,8 @@ do_ui_manager (GtkWidget *do_widget)
 
       label = gtk_label_new ("Type\n<alt>\nto start");
       gtk_widget_set_size_request (label, 200, 200);
-      gtk_misc_set_alignment (GTK_MISC (label), 0.5, 0.5);
+      gtk_widget_set_halign (label, GTK_ALIGN_CENTER);
+      gtk_widget_set_valign (label, GTK_ALIGN_CENTER);
       gtk_box_pack_start (GTK_BOX (box1), label, TRUE, TRUE, 0);