diff --git a/Documentation/devicetree/bindings/hwmon/ti,tmp401.yaml b/Documentation/devicetree/bindings/hwmon/ti,tmp401.yaml
index 0e8ddf0ad789..f283b567d5b6 100644
--- a/Documentation/devicetree/bindings/hwmon/ti,tmp401.yaml
+++ b/Documentation/devicetree/bindings/hwmon/ti,tmp401.yaml
@@ -50,6 +50,9 @@ properties:
     minimum: 0
     maximum: 15
 
+  "#thermal-sensor-cells":
+    const: 1
+
 allOf:
   - if:
       properties: