diff --git a/gtk2_ardour/luawindow.cc b/gtk2_ardour/luawindow.cc
index 6b0ca8e08b..98846275f4 100644
--- a/gtk2_ardour/luawindow.cc
+++ b/gtk2_ardour/luawindow.cc
@@ -94,7 +94,7 @@ LuaWindow::LuaWindow ()
 	, _btn_open (_("Import"))
 	, _btn_save (_("Save"))
 	, _btn_delete (_("Delete"))
-	, _current_buffer (0)
+	, _current_buffer ()
 {
 	set_name ("Lua");