diff --git a/demos/widget-factory/widget-factory.c b/demos/widget-factory/widget-factory.c
index 5947364ed0..34a307adf7 100644
--- a/demos/widget-factory/widget-factory.c
+++ b/demos/widget-factory/widget-factory.c
@@ -1671,7 +1671,7 @@ activate (GApplication *app)
   widget = (GtkWidget *)gtk_builder_get_object (builder, "pastebutton");
   g_signal_connect (widget, "clicked", G_CALLBACK (handle_cutcopypaste), widget2);
   g_signal_connect_object (gtk_widget_get_clipboard (widget2, GDK_SELECTION_CLIPBOARD), "owner-change",
-                           G_CALLBACK (clipboard_owner_change), widget);
+                           G_CALLBACK (clipboard_owner_change), widget, 0);
 
   widget = (GtkWidget *)gtk_builder_get_object (builder, "osd_frame");
   widget2 = (GtkWidget *)gtk_builder_get_object (builder, "totem_like_osd");