S3: Disabled canned ACL

Hi, I'm aware of deprecation status, but I just need a quick answer...

Is it possible to disable sending canned ACL for S3? By default public-read is set, but I'd like to disable sending the canned ACL at all and send direct grants through headers.

If I set headers now I get a response from S3 API that I cannot mix both canned ACLs and grants. Thanks!