It really depends on four things:
a) what percentage of your all incoming links these links constitute?
b) do you have other links from other sources with varying anchor text, possibly with your brand as anchor text, etc.?
c) are these sites linking to you quality sites or spammy sites?
d) is your website well established, with a history of >1 year and stable traffic?
If you could provide these answers, I could provide a more specific recommendation.