diff --git a/lib/philomena_web/controllers/conversation/message_controller.ex b/lib/philomena_web/controllers/conversation/message_controller.ex
index 95145c44..fc3c9c1b 100644
--- a/lib/philomena_web/controllers/conversation/message_controller.ex
+++ b/lib/philomena_web/controllers/conversation/message_controller.ex
@@ -7,6 +7,7 @@ defmodule PhilomenaWeb.Conversation.MessageController do
   import Ecto.Query
 
   plug PhilomenaWeb.FilterBannedUsersPlug
+  plug PhilomenaWeb.CanaryMapPlug, create: :show
   plug :load_and_authorize_resource, model: Conversation, id_name: "conversation_id", id_field: "slug", persisted: true
 
   def create(conn, %{"message" => message_params}) do