diff --git a/node-daemon/pvcd/DomainInstance.py b/node-daemon/pvcd/DomainInstance.py
index 4a9d6bc9..910f9a7e 100644
--- a/node-daemon/pvcd/DomainInstance.py
+++ b/node-daemon/pvcd/DomainInstance.py
@@ -32,7 +32,7 @@ import kazoo.client
 import pvcd.log as log
 import pvcd.zkhandler as zkhandler
 
-class DomainInstance:
+class DomainInstance(object):
     # Initialization function
     def __init__(self, domuuid, zk_conn, config, logger, this_node):
         # Passed-in variables on creation
diff --git a/node-daemon/pvcd/NodeInstance.py b/node-daemon/pvcd/NodeInstance.py
index 5297440a..4325b8ca 100644
--- a/node-daemon/pvcd/NodeInstance.py
+++ b/node-daemon/pvcd/NodeInstance.py
@@ -33,7 +33,7 @@ import pvcd.log as log
 import pvcd.zkhandler as zkhandler
 import pvcd.common as common
 
-class NodeInstance():
+class NodeInstance(object):
     # Initialization function
     def __init__(self, name, this_node, zk_conn, config, logger, d_node, d_network, d_domain):
         # Passed-in variables on creation
diff --git a/node-daemon/pvcd/VXNetworkInstance.py b/node-daemon/pvcd/VXNetworkInstance.py
index f6ffee10..45592c0e 100644
--- a/node-daemon/pvcd/VXNetworkInstance.py
+++ b/node-daemon/pvcd/VXNetworkInstance.py
@@ -28,7 +28,7 @@ import pvcd.log as log
 import pvcd.zkhandler as zkhandler
 import pvcd.common as common
 
-class VXNetworkInstance():
+class VXNetworkInstance(object):
     # Initialization function
     def __init__ (self, vni, zk_conn, config, logger, this_node):
         self.vni = vni