diff --git a/Documentation/devicetree/bindings/watchdog/toshiba,visconti-wdt.yaml b/Documentation/devicetree/bindings/watchdog/toshiba,visconti-wdt.yaml
index eba083822d1f..51d03d5b08ad 100644
--- a/Documentation/devicetree/bindings/watchdog/toshiba,visconti-wdt.yaml
+++ b/Documentation/devicetree/bindings/watchdog/toshiba,visconti-wdt.yaml
@@ -24,14 +24,12 @@ properties:
   clocks:
     maxItems: 1
 
-  timeout-sec: true
-
 required:
   - compatible
   - reg
   - clocks
 
-additionalProperties: false
+unevaluatedProperties: false
 
 examples:
   - |