diff --git a/packages/@uppy/aws-s3/src/s3-client/S3.ts b/packages/@uppy/aws-s3/src/s3-client/S3.ts
index 1dd5f4d1f..2d668cd65 100644
--- a/packages/@uppy/aws-s3/src/s3-client/S3.ts
+++ b/packages/@uppy/aws-s3/src/s3-client/S3.ts
@@ -255,6 +255,7 @@ class S3mini {
         method: 'PUT',
         key,
         uploadId,
+        partNumber,
       },
       data,
       onProgress,