diff --git a/homeassistant/components/device_tracker/actiontec.py b/homeassistant/components/device_tracker/actiontec.py
index 41e209ac506..d9e89ab7157 100644
--- a/homeassistant/components/device_tracker/actiontec.py
+++ b/homeassistant/components/device_tracker/actiontec.py
@@ -130,6 +130,7 @@ class ActiontecDeviceScanner(object):
             telnet.read_until(prompt)
             leases_result = telnet.read_until(prompt).split(b'\n')[1:-1]
             telnet.write('exit\n'.encode('ascii'))
+            return None
         except EOFError:
             _LOGGER.exception("Unexpected response from router")
             return