diff --git a/homeassistant/components/device_tracker/tplink.py b/homeassistant/components/device_tracker/tplink.py
index 60c337309d4032..d368637cd6b812 100755
--- a/homeassistant/components/device_tracker/tplink.py
+++ b/homeassistant/components/device_tracker/tplink.py
@@ -199,9 +199,9 @@ class Tplink3DeviceScanner(TplinkDeviceScanner):
     """
 
     def __init__(self, config):
-        super(Tplink3DeviceScanner, self).__init__(config)
         self.stok = ''
         self.sysauth = ''
+        super(Tplink3DeviceScanner, self).__init__(config)
 
     def scan_devices(self):
         """