diff --git a/dendrite-config.yaml b/dendrite-config.yaml
index d04707a61..444830255 100644
--- a/dendrite-config.yaml
+++ b/dendrite-config.yaml
@@ -52,9 +52,13 @@ media:
 kafka:
     # Where the kafka servers are running.
     addresses: ["localhost:9092"]
+    # Whether to use naffka instead of kafka.
+    # Naffka can only be used when running dendrite as a single monolithic server.
+    # Kafka can be used both with a monolithic server and when running the
+    # components as separate servers.
+    use_naffka: false
     # The names of the kafka topics to use.
     topics:
-        input_room_event: roomserverInput
         output_room_event: roomserverOutput
         output_client_data: clientapiOutput
         user_updates: userUpdates