diff -r 41adf1dfc7a7 -r 25f16349644b etherlab/EthercatSlave.py
--- a/etherlab/EthercatSlave.py	Sat Sep 29 16:39:25 2018 +0300
+++ b/etherlab/EthercatSlave.py	Sat Sep 29 16:40:56 2018 +0300
@@ -64,7 +64,7 @@
 #                    Ethercat Node
 # --------------------------------------------------
 
-class _EthercatSlaveCTN:
+class _EthercatSlaveCTN(object):
     NODE_PROFILE = None
     EditorType = NodeEditor