diff --git a/homeassistant/components/tuya/switch.py b/homeassistant/components/tuya/switch.py
index b33852870a879e4aea2c24c9c47094c125d022b4..0f893aecb42a24d0a5edf37162ce41f5c4816b98 100644
--- a/homeassistant/components/tuya/switch.py
+++ b/homeassistant/components/tuya/switch.py
@@ -520,6 +520,15 @@ SWITCHES: dict[str, tuple[SwitchEntityDescription, ...]] = {
             entity_category=EntityCategory.CONFIG,
         ),
     ),
+    # Thermostat
+    # https://developer.tuya.com/en/docs/iot/f?id=K9gf45ld5l0t9
+    "wk": (
+        SwitchEntityDescription(
+            key=DPCode.CHILD_LOCK,
+            translation_key="child_lock",
+            entity_category=EntityCategory.CONFIG,
+        ),
+    ),
     # Thermostatic Radiator Valve
     # Not documented
     "wkf": (