diff --git a/website/src/docs/aws-s3-multipart.md b/website/src/docs/aws-s3-multipart.md
index 3c1975f1d..a3c6b43ba 100644
--- a/website/src/docs/aws-s3-multipart.md
+++ b/website/src/docs/aws-s3-multipart.md
@@ -91,7 +91,7 @@ Return a Promise for an object with keys:
      UploadId: partData.uploadId,
      PartNumber: partData.number,
      Body: '', // Empty, because it is uploaded later
-     Expires: Date.now() + 5 * 60 * 1000
+     Expires: 5 * 60,
    }, (err, url) => { /* there's the url! */ })
    ```