diff --git a/xilem_web/web_examples/streams/src/api.rs b/xilem_web/web_examples/streams/src/api.rs
index 78af368be..22f3c4ccf 100644
--- a/xilem_web/web_examples/streams/src/api.rs
+++ b/xilem_web/web_examples/streams/src/api.rs
@@ -1,3 +1,6 @@
+// Copyright 2024 the Xilem Authors
+// SPDX-License-Identifier: Apache-2.0
+
 use std::future::Future;
 
 use anyhow::anyhow;