diff --git a/Bindings/media/rockchip-isp1.yaml b/Bindings/media/rockchip-isp1.yaml
index e466dff..afcaa427 100644
--- a/Bindings/media/rockchip-isp1.yaml
+++ b/Bindings/media/rockchip-isp1.yaml
@@ -90,15 +90,16 @@
         description: connection point for input on the parallel interface
 
         properties:
-          bus-type:
-            enum: [5, 6]
-
           endpoint:
             $ref: video-interfaces.yaml#
             unevaluatedProperties: false
 
-        required:
-          - bus-type
+            properties:
+              bus-type:
+                enum: [5, 6]
+
+            required:
+              - bus-type
 
     anyOf:
       - required: