diff --git a/pvcd.py b/pvcd.py
index 3e0560c5..51662e7d 100755
--- a/pvcd.py
+++ b/pvcd.py
@@ -64,7 +64,7 @@ s_domain = dict()
 node_list = []
 
 @zk.ChildrenWatch('/nodes')
-def updatenodes(new_node_list):
+def updatenodes(new_node_list, stat):
     global node_list
     node_list = new_node_list
     print('Node list: %s' % node_list)