diff --git a/sensors.py b/sensors.py
index 87e3d05..14e5b29 100644
--- a/sensors.py
+++ b/sensors.py
@@ -191,9 +191,9 @@ class AHT40(Sensor):
         if not enable_aht:
             return (time, None)
         return self.store(
-            time, aht20.get_temperature_crc8() if (
+            time, aht.get_temperature_crc8() if (
                 self.measure == 'Temperature'
-            ) else aht20.get_humidity_crc8())
+            ) else aht.get_humidity_crc8())
 
 class Sensors():
     def __init__(self, history=2621440):