diff --git a/devices/devices/sdp/sst.py b/devices/devices/sdp/sst.py
index b9118c70e73e0b35385bc11fc00a558c4850e65b..e6b5ef4015b64dd3bf546cfc24b3287745a19bf4 100644
--- a/devices/devices/sdp/sst.py
+++ b/devices/devices/sdp/sst.py
@@ -134,7 +134,7 @@ class SST(hardware_device):
 
         self.sst_client = sst_client("0.0.0.0", self.SST_Client_Port, self.Fault, self)
 
-        self.OPCua_client = OPCUAConnection("opc.tcp://{}:{}/".format(self.OPC_Server_Name, self.OPC_Server_Port), "http://lofar.eu", self.OPC_Time_Out, self.Fault, self)
+        self.OPCUA_client = OPCUAConnection("opc.tcp://{}:{}/".format(self.OPC_Server_Name, self.OPC_Server_Port), "http://lofar.eu", self.OPC_Time_Out, self.Fault, self)
 
         # map an access helper class
         for i in self.attr_list():
@@ -151,7 +151,7 @@ class SST(hardware_device):
 
         self.sst_client.start()
 
-        self.OPCua_client.start()
+        self.OPCUA_client.start()
 
     # --------
     # Commands