diff --git a/cura/Machines/MaterialManager.py b/cura/Machines/MaterialManager.py
index e357a3fbe1..8b74596667 100644
--- a/cura/Machines/MaterialManager.py
+++ b/cura/Machines/MaterialManager.py
@@ -160,11 +160,11 @@ class MaterialManager(QObject):
                 key_data.append(root_material_metadata.get(key))
             key_data = tuple(key_data)
 
-            # If the key_data doesn't exist, no matter if the material is read only...
+            # If the key_data doesn't exist, it doesn't matter if the material is read only...
             if key_data not in material_group_dict:
                 material_group_dict[key_data] = dict()
             else:
-                # ...but if key_data exists, we just overrite it if the material is read only, otherwise we skip it
+                # ...but if key_data exists, we just overwrite it if the material is read only, otherwise we skip it
                 if not machine_node.is_read_only:
                     continue
             approximate_diameter = root_material_metadata.get("approximate_diameter")