diff --git a/kasa/interfaces/thermostat.py b/kasa/interfaces/thermostat.py
index de7831b0..c5cc512c 100644
--- a/kasa/interfaces/thermostat.py
+++ b/kasa/interfaces/thermostat.py
@@ -16,6 +16,7 @@ class ThermostatState(Enum):
     Calibrating = "progress_calibration"
     Idle = "idle"
     Off = "off"
+    Shutdown = "shutdown"
     Unknown = "unknown"