diff --git a/README.adoc b/README.adoc
index d9ef40021..9be4bba64 100644
--- a/README.adoc
+++ b/README.adoc
@@ -492,6 +492,13 @@ dependencies { <2>
 If you want to use RabbitMQ or Kafka instead of HTTP, add the `spring-rabbit` or `spring-kafka` dependency.
 The default destination name is `zipkin`.
 
+If using Kafka, you must set the property `spring.zipkin.sender.type` property accordingly:
+
+[source,yaml]
+----
+spring.zipkin.sender.type: kafka
+----
+
 CAUTION: `spring-cloud-sleuth-stream` is deprecated and incompatible with these destinations.
 
 If you want Sleuth over RabbitMQ, add the `spring-cloud-starter-zipkin` and `spring-rabbit`
@@ -597,8 +604,8 @@ Consequently, if you set  a baggage element on a Span, it is sent downstream to
 * If `spring-cloud-sleuth-zipkin` is on the classpath, the app generates and collects Zipkin-compatible traces.
 By default, it sends them over HTTP to a Zipkin server on localhost (port 9411).
 You can configure the location of the service by setting `spring.zipkin.baseUrl`.
-** If you depend on `spring-rabbit` or `spring-kafka`, your app sends traces to a broker instead of HTTP.
-**
+** If you depend on `spring-rabbit`, your app sends traces to a RabbitMQ broker instead of HTTP.
+** If you depend on `spring-kafka`, and set `spring.zipkin.sender.type: kafka`, your app sends traces to a Kafka broker instead of HTTP.
 
 CAUTION: `spring-cloud-sleuth-stream` is deprecated and should no longer be used.