diff --git a/Documentation/devicetree/bindings/serial/8250.yaml b/Documentation/devicetree/bindings/serial/8250.yaml
index 692aa05500fd..6ba0325039be 100644
--- a/Documentation/devicetree/bindings/serial/8250.yaml
+++ b/Documentation/devicetree/bindings/serial/8250.yaml
@@ -45,7 +45,7 @@ allOf:
                   - ns16550
                   - ns16550a
     then:
-      anyOf:
+      oneOf:
         - required: [ clock-frequency ]
         - required: [ clocks ]