bayes score no showing up in the header

[motty cruz]

here is the header:

X-Virus-Scanned: amavisd-new at mydomain.com
X-Spam-Flag: NO
X-Spam-Score: 5.243
X-Spam-Level: *****
X-Spam-Status: No, score=5.243 tagged_above=-999 required=5.3
    tests=[DATE_IN_PAST_12_24=0.804, DKIM_ADSP_CUSTOM_MED=0.001,
    FREEMAIL_FROM=0.001, INVALID_DATE=0.432, MISSING_MID=0.14,
    NML_ADSP_CUSTOM_MED=1.2, RDNS_NONE=2.013, SPF_NEUTRAL=0.652]
    autolearn=no

I do not see the bayes_score? any idea?
Thanks in advance!