diff --git a/gtk2_ardour/window_manager.cc b/gtk2_ardour/window_manager.cc
index 629e24419b..5fa1b6c7b0 100644
--- a/gtk2_ardour/window_manager.cc
+++ b/gtk2_ardour/window_manager.cc
@@ -420,8 +420,10 @@ void
 ProxyBase::save_pos_and_size ()
 {
 	Gtk::Window* win = get (false);
-	win->get_position (_x_off, _y_off);
-	win->get_size (_width, _height);
+	if (win) {
+		win->get_position (_x_off, _y_off);
+		win->get_size (_width, _height);
+	}
 }
 /*-----------------------*/