diff --git a/docs/Config_Changes.md b/docs/Config_Changes.md
index f2963ef2..6dd6905f 100644
--- a/docs/Config_Changes.md
+++ b/docs/Config_Changes.md
@@ -6,6 +6,9 @@ All dates in this document are approximate.
 
 # Changes
 
+20210220: The `BME280` temperature sensor has been renamed to
+`bme280`.
+
 20210219: The `rpi_temperature` module has been renamed to
 `temperature_host`.  Replace any occurrences of `sensor_type:
 rpi_temperature` with `sensor_type: temperature_host`.  The path to
diff --git a/klippy/extras/bme280.py b/klippy/extras/bme280.py
index c07da843..46232315 100644
--- a/klippy/extras/bme280.py
+++ b/klippy/extras/bme280.py
@@ -208,4 +208,4 @@ class BME280:
 def load_config(config):
     # Register sensor
     pheaters = config.get_printer().load_object(config, "heaters")
-    pheaters.add_sensor_factory("BME280", BME280)
+    pheaters.add_sensor_factory("bme280", BME280)