Conditional addClass not working for each elements with same class

Les say I have some buttons with same class. On page load I am checking some value using ajax for each button. Depending on returned value of ajax request I want to add some class to the buttons, but it is not working,

$(document).ready(function(){
    $('.add-remove-permissoion').each(function(){
        var child = $(this).val();
        var parent = $('#parent-name').text();
        $.get('my-url'}, function(data){
            if(data == 1){
                $(this).addClass('glyphicon glyphicon-ok');
            }else{
                $(this).addClass('emptybox-blank');
            }
        });
    });
});

I have checked that my ajax request is returning correct data. What is that I am doing wrong here?