diff --git a/homeassistant/components/sma/sensor.py b/homeassistant/components/sma/sensor.py
index b2692a37059..34aed146cf0 100644
--- a/homeassistant/components/sma/sensor.py
+++ b/homeassistant/components/sma/sensor.py
@@ -143,7 +143,6 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
             hass_sensors.append(SMAsensor(sensor_def[name], sub_sensors))
             used_sensors.append(name)
             used_sensors.extend(attr)
-        used_sensors = [sensor_def[s] for s in set(used_sensors)]
 
     if isinstance(config_sensors, list):
         if not config_sensors:  # Use all sensors by default
@@ -152,6 +151,7 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
         for sensor in used_sensors:
             hass_sensors.append(SMAsensor(sensor_def[sensor], []))
 
+    used_sensors = [sensor_def[s] for s in set(used_sensors)]
     async_add_entities(hass_sensors)
 
     # Init the SMA interface