SQL_ATTR_TRACE option doesn't work

Hi,
I'm calling this API:
::SQLSetConnectAttr(
                                  hdbc,
                                  SQL_ATTR_TRACE,
                                  (SQLPOINTER)sitrace,
                                  0 );

where sitrace is one of SQL_OPT_TRACE_ON or SQL_OPT_TRACE_OFF

and get this error back:

HY092, Native error: 0, Msg: [FreeTDS][SQL Server]Invalid option;

I checked the source code in odbc.c and found that unless TDS_NO_DM is 
defined the driver doesn't understand this option.
Is it safe if I remove the corresponding #ifdef TDS_NO_DM and recompile 
the FreeTDS ODBC driver?

Thanks,
Mike