Strip out while(1) prepended to JSON object

I am making an ajax get request, but receive back a JSON object prepended with while(1) eg.

while(1);{"servers":[{"some_data": data, "etc":...}]}

We just started doing this to prevent malicious attacks, but I am not sure how to strip it out so that I can parse the JSON properly.

here is the function I am using for the $.get call

function myFunction() {
    $.get('/v1/servers').success(function(data) {
      data.servers.forEach(function(server){
        presentServer(server);
      });
    });
}