diff --git a/cura/CuraApplication.py b/cura/CuraApplication.py
index 02c5c04203..ab7c093b1d 100755
--- a/cura/CuraApplication.py
+++ b/cura/CuraApplication.py
@@ -1041,7 +1041,7 @@ class CuraApplication(QtApplication):
 
         nodes = []
         for node in DepthFirstIterator(self.getController().getScene().getRoot()):
-            if type(node) not in {SceneNode, CuraSceneNode}:
+            if not isinstance(node, SceneNode):
                 continue
             if (not node.getMeshData() and not node.callDecoration("getLayerData")) and not node.callDecoration("isGroup"):
                 continue  # Node that doesnt have a mesh and is not a group.