diff --git a/Documentation/devicetree/bindings/soc/mediatek/devapc.yaml b/Documentation/devicetree/bindings/soc/mediatek/devapc.yaml
index 6c763f873a63..31e4d3c339bf 100644
--- a/Documentation/devicetree/bindings/soc/mediatek/devapc.yaml
+++ b/Documentation/devicetree/bindings/soc/mediatek/devapc.yaml
@@ -44,6 +44,8 @@ required:
   - clocks
   - clock-names
 
+additionalProperties: false
+
 examples:
   - |
     #include <dt-bindings/interrupt-controller/arm-gic.h>