diff --git a/tools/Icmp-Redirect.py b/tools/Icmp-Redirect.py
index 35d52e28..afe86718 100755
--- a/tools/Icmp-Redirect.py
+++ b/tools/Icmp-Redirect.py
@@ -19,6 +19,7 @@
 import struct
 import optparse
 import pipes
+import sys
 from socket import *
 sys.path.append('../')
 from odict import OrderedDict