diff --git a/packages/@uppy/aws-s3/src/s3-client/S3.ts b/packages/@uppy/aws-s3/src/s3-client/S3.ts
index 8b881f4be..52419a795 100644
--- a/packages/@uppy/aws-s3/src/s3-client/S3.ts
+++ b/packages/@uppy/aws-s3/src/s3-client/S3.ts
@@ -1,3 +1,8 @@
+/**
+ * Taken from https://github.com/good-lly/s3mini.git, by Jølly Good, under MIT license.
+ * Modified to make it work with Uppy.
+ */
+
 import * as C from './consts.js'
 import type * as IT from './types.js'
 import * as U from './utils.js'