diff --git a/mininet/clean.py b/mininet/clean.py
index 2911edba01171c59c491ef9ae9e7baaf5504e31b..10f0cf878d5b7ad31ee268c181c7fea205b63c58 100755
--- a/mininet/clean.py
+++ b/mininet/clean.py
@@ -27,7 +27,7 @@ def cleanup():
     info("*** Removing excess controllers/ofprotocols/ofdatapaths/pings/noxes"
          "\n")
     zombies = 'controller ofprotocol ofdatapath ping nox_core lt-nox_core '
-    zombies += 'ovs-openflowd ovs-controller udpbwtest mnexec'
+    zombies += 'ovs-openflowd ovs-controller udpbwtest mnexec ivs'
     # Note: real zombie processes can't actually be killed, since they
     # are already (un)dead. Then again,
     # you can't connect to them either, so they're mostly harmless.