diff --git a/cura/BuildVolume.py b/cura/BuildVolume.py
index 61802167a7..f071bf4057 100644
--- a/cura/BuildVolume.py
+++ b/cura/BuildVolume.py
@@ -199,7 +199,6 @@ class BuildVolume(SceneNode):
         disallowed_areas = self._active_container_stack.getProperty("machine_disallowed_areas", "value")
         areas = []
 
-        skirt_size = 0.0
         skirt_size = self._getSkirtSize(self._active_container_stack)
 
         if disallowed_areas:
diff --git a/cura/SettingOverrideDecorator.py b/cura/SettingOverrideDecorator.py
index e3e3555016..24360ed992 100644
--- a/cura/SettingOverrideDecorator.py
+++ b/cura/SettingOverrideDecorator.py
@@ -51,8 +51,8 @@ class SettingOverrideDecorator(SceneNodeDecorator):
     def getActiveExtruder(self):
         return self._extruder_stack
 
-    def _onSettingChanged(self, instance, property):
-        if property == "value":  # Only reslice if the value has changed.
+    def _onSettingChanged(self, instance, property_name): # Reminder: 'property' is a built-in function
+        if property_name == "value":  # Only reslice if the value has changed.
             Application.getInstance().getBackend().forceSlice()
 
     ##  Makes sure that the stack upon which the container stack is placed is
@@ -78,4 +78,4 @@ class SettingOverrideDecorator(SceneNodeDecorator):
         self.activeExtruderChanged.emit()
 
     def getStack(self):
-        return self._stack
\ No newline at end of file
+        return self._stack