diff --git a/docs/modules/ROOT/pages/spring-cloud-function/programming-model.adoc b/docs/modules/ROOT/pages/spring-cloud-function/programming-model.adoc
index 38e4b59fe..1b8bb3e9a 100644
--- a/docs/modules/ROOT/pages/spring-cloud-function/programming-model.adoc
+++ b/docs/modules/ROOT/pages/spring-cloud-function/programming-model.adoc
@@ -195,8 +195,9 @@ The `MessageRoutingCallback` is a strategy to assist with determining the name o
 [source, java]
 ----
 public interface MessageRoutingCallback {
-	FunctionRoutingResult routingResult(Message<?> message);
-	. . .
+    default String routingResult(Message<?> message) {
+        return (String) message.getHeaders().get("spring.cloud.function.definition");
+    }
 }
 ----
 
@@ -739,4 +740,4 @@ private final static JsonMasker masker = JsonMasker.INSTANCE();
 . . .
 
 logger.info("Received: " + masker.mask(new String(payload, StandardCharsets.UTF_8)));
-----
\ No newline at end of file
+----