It would be normal (from what I've seen, having been on both sides of such agreements) to have equal termination (without cause) rights: generally one month's notice.
By the way, I've also seen three month contract (fixed term), with automatic renewal at the end for one month at a time (i.e. it renews automatically for an additional one month at the end of each month, unless either party doen't want to renew).
If it's something that concerns you, I wouldn't think twice about bringing it (or any other unbalanced clause) up: it's not unreasonable. It's entirely up to you how hard you push for it to be changed, though.
Note: termination with cause (e.g. serious misconduct and the like) is completely different - don't question that!