- gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(dialog)->vbox), page_number_label, FALSE, FALSE, 5 );
- gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(dialog)->vbox), widgets->page_number, FALSE, FALSE, 5 );
+
+ /* Packing all widgets */
+ GtkBox *box = GTK_BOX(gtk_dialog_get_content_area(GTK_DIALOG(dialog)));
+ gtk_box_pack_start ( box, page_number_label, FALSE, FALSE, 5 );
+ gtk_box_pack_start ( box, widgets->page_number, FALSE, FALSE, 5 );