diff --git a/cura/Machines/MaterialManager.py b/cura/Machines/MaterialManager.py
index 84f08a3b27..b52bd7dca2 100644
--- a/cura/Machines/MaterialManager.py
+++ b/cura/Machines/MaterialManager.py
@@ -245,7 +245,7 @@ class MaterialManager(QObject):
         material_id_metadata_dict = dict()
         for node in nodes_to_check:
             if node is not None:
-                material_id_metadata_dict = {mid: node for mid, node in variant_node.material_map.items()}
+                material_id_metadata_dict = {mid: node for mid, node in node.material_map.items()}
                 break
 
         return material_id_metadata_dict