Radpostauth question

Hi, Does anyone knows how I could save the CHAP password into radpostauth pass in a VISIBLE format, in mysql ? Actually I can correctly log both the successful and unsuccessful authentications, but I can see only the PAP auth in a visible format. Is there a chance to configure freeradius to see a visible chap-password when quering in mysql , not the 0xea8c35456432dd70a3bbe3ef701a669a13 encrypted formula ? thanks, John