diff --git a/ifupdown/ifupdownbase.py b/ifupdown/ifupdownbase.py
index e7fa99e..f44ae17 100644
--- a/ifupdown/ifupdownbase.py
+++ b/ifupdown/ifupdownbase.py
@@ -10,6 +10,7 @@
 import logging
 import re
 import os
+import traceback
 import rtnetlink_api as rtnetlink_api
 
 from iface import *