diff --git a/cura/Settings/MaterialSettingsVisibilityHandler.py b/cura/Settings/MaterialSettingsVisibilityHandler.py
index 5aa5cc02ab..42123b3919 100644
--- a/cura/Settings/MaterialSettingsVisibilityHandler.py
+++ b/cura/Settings/MaterialSettingsVisibilityHandler.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2016 Ultimaker B.V.
+# Copyright (c) 2017 Ultimaker B.V.
 # Uranium is released under the terms of the AGPLv3 or higher.
 
 from UM.Settings.Models.SettingVisibilityHandler import SettingVisibilityHandler
@@ -7,13 +7,13 @@ class MaterialSettingsVisibilityHandler(SettingVisibilityHandler):
     def __init__(self, parent = None, *args, **kwargs):
         super().__init__(parent = parent, *args, **kwargs)
 
-        material_settings = set([
+        material_settings = {
             "default_material_print_temperature",
             "material_bed_temperature",
             "material_standby_temperature",
             "cool_fan_speed",
             "retraction_amount",
             "retraction_speed",
-        ])
+        }
 
         self.setVisible(material_settings)