diff --git a/Polyhedron/demo/Polyhedron/Scene.cpp b/Polyhedron/demo/Polyhedron/Scene.cpp
index b148e8df46b..c70929ab4a5 100644
--- a/Polyhedron/demo/Polyhedron/Scene.cpp
+++ b/Polyhedron/demo/Polyhedron/Scene.cpp
@@ -1928,6 +1928,7 @@ void Scene::removeViewer(Viewer_interface *viewer)
   if(viewer->property("is_destroyed").toBool())
     return;
 
+  viewer->makeCurrent();
   vaos[viewer]->destroy();
   vaos[viewer]->deleteLater();
   vaos.remove(viewer);