diff --git a/Cura/newui/machineCom.py b/Cura/newui/machineCom.py
index 5f6974d..f4dfee6 100644
--- a/Cura/newui/machineCom.py
+++ b/Cura/newui/machineCom.py
@@ -1,7 +1,7 @@
 from __future__ import absolute_import
 import __init__
 
-import os, glob, wx, threading
+import os, glob, wx, threading, sys
 
 from serial import Serial