diff --git a/cura/Settings/CuraContainerRegistry.py b/cura/Settings/CuraContainerRegistry.py
index 91327ceb54..a4dbcc4ca1 100644
--- a/cura/Settings/CuraContainerRegistry.py
+++ b/cura/Settings/CuraContainerRegistry.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2016 Ultimaker B.V.
+# Copyright (c) 2017 Ultimaker B.V.
 # Cura is released under the terms of the AGPLv3 or higher.
 
 import os
@@ -44,7 +44,7 @@ class CuraContainerRegistry(ContainerRegistry):
         if isinstance(container, InstanceContainer) and type(container) != type(self.getEmptyInstanceContainer()):
             #Check against setting version of the definition.
             required_setting_version = int(container.getDefinition().getMetaDataEntry("setting_version"))
-            actual_setting_version = int(container.getMetaDataEntry("setting_version", default = "0"))
+            actual_setting_version = int(container.getMetaDataEntry("setting_version", default = 0))
             if required_setting_version != actual_setting_version:
                 Logger.log("w", "Instance container {container_id} is outdated. Its setting version is {actual_setting_version} but it should be {required_setting_version}.".format(container_id = container.getId(), actual_setting_version = actual_setting_version, required_setting_version = required_setting_version))
                 return #Don't add.