diff --git a/ocpp/v201/datatypes.py b/ocpp/v201/datatypes.py
index 0c01b70ab..702e6ad5e 100644
--- a/ocpp/v201/datatypes.py
+++ b/ocpp/v201/datatypes.py
@@ -395,6 +395,7 @@ class EventDataType:
     variable: VariableType
     cause: Optional[int] = None
     tech_code: Optional[str] = None
+    tech_info: Optional[str] = None
     cleared: Optional[bool] = None
     transaction_id: Optional[str] = None
     variable_monitoring_id: Optional[int] = None