1064 Error When Trying to View Own Profile

[The Equivocate]

When you try and view your own profile, you get this error:

Invalid SQL:
SELECT user.avatarid, user.avatarrevision, avatarpath, NOT ISNULL(avatardata) AS hascustom, customavatar.dateline
FROM user AS user
LEFT JOIN avatar AS avatar ON avatar.avatarid = user.avatarid
LEFT JOIN customavatar AS customavatar ON customavatar.userid = user.userid
WHERE user.userid =
mysql error: You have an error in your SQL syntax. Check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 5

mysql error number: 1064