Is there a way to turn off gzip compression when deploying to AWS?

When using cactus deploy to deploy to AWS S3, the files are uploaded (and served by S3) with Content-Encoding: gzip, which is not compatible with some older browsers (see, e.g., Which browsers can handle 'Content-Encoding:'?). Is there a way to turn off gzip compression when deploying, to preserve compatibility with older browsers?