diff --git a/receiver/mongodbreceiver/README.md b/receiver/mongodbreceiver/README.md
index 6c996b296bab..c771cea1f98e 100644
--- a/receiver/mongodbreceiver/README.md
+++ b/receiver/mongodbreceiver/README.md
@@ -52,6 +52,7 @@ receivers:
   mongodb:
     hosts:
       - endpoint: localhost:27017
+        transport: tcp
     username: otel
     password: ${env:MONGODB_PASSWORD}
     collection_interval: 60s