Reject Code Logging

[postfix]

I noticed when mail is rejected by a milter or header check it only logs 
the DSN number and not the error code (550).

cleanup: milter-reject: END-OF-MESSAGE from 
mail.example.com[111.222.333.444]: 5.7.1 Command rejected; 
from=<donotre...@example.com> to=<u...@example.com> proto=ESMTP 
helo=<mail.example.com>

Is this intentional or should it have the full reject code "550 5.7.1"?