User:Hash Saving Syntax?

My source file is using "user:hash", and I want to have hashcat save the email and assign it back to the corresponding cracked hash.

My syntax currently is
oclHashcat64.exe -m 0 --username --outfile=cracked.txt --remove hash.txt wordlist/rockyou.txt

And this doesn't appear to do the trick as it saves the hash:
8afa847f50a716e43752d995c8e7435a:testhash

I want output to look like
testhash@yahoo.com:testhash

Any syntax help would be NEEDED direly, and greatly appreciated.