diff --git a/Documentation/devicetree/bindings/net/renesas,ether.yaml b/Documentation/devicetree/bindings/net/renesas,ether.yaml
index 29355ab98569..d6c5983499b8 100644
--- a/Documentation/devicetree/bindings/net/renesas,ether.yaml
+++ b/Documentation/devicetree/bindings/net/renesas,ether.yaml
@@ -59,6 +59,9 @@ properties:
   clocks:
     maxItems: 1
 
+  iommus:
+    maxItems: 1
+
   power-domains:
     maxItems: 1