diff --git a/ocpp/v16/enums.py b/ocpp/v16/enums.py
index cd35bfb62..c91fe9b79 100644
--- a/ocpp/v16/enums.py
+++ b/ocpp/v16/enums.py
@@ -753,7 +753,8 @@ class UnitOfMeasure(str, Enum):
     """
     Allowable values of the optional "unit" field of a Value element, as used
     in MeterValues.req and StopTransaction.req messages. Default value of
-    "unit" is always "Wh".
+    "unit" is always "Wh". Also used in 2.0.1 component/variables -
+    specifically the unit in variableCharacteristics.
     """
 
     wh = "Wh"