doneFileName=${file:name} don't work with ftp component

I tried to write a file on a ftp server using a done file to signal the end of the file transmission. I guess the file/ftp component preserves the doneFileName option. But the ftp component doesn't replace the doneFileName=${file:name} correctly.

My fpt endpoint looks like this:

.to(ftp:myuser@myserver/mypath?doneFileName=${file:name}.done&charset=utf-8&password={{ftp.passwd}})

But the route generates only a file with name name.done

I also tried the option stepwise=false as described here http://camel.465427.n5.nabble.com/doneFileName-doesn-t-seem-to-work-td4704701.html. With the same result.

I also test this option with the file component and it works.