WAP Push Message format, CR/LF required?

I have an application that generates WAP Push messages in Unix file format
(i. e. no carriage returns, just line feeds).  The Kannel parsing functions
in wap_push_pap_mime.c seem to insist on hard-coded carriage returns.  

Is there some standard supporting this insistence, or is the Kannel code
just overly rigid?

Thanks,

Charles