.nav-tabs-custom ul.nav li a.has-error:before {
    content: "\f06a";
    font-family: FontAwesome, serif;
    display: inline-block;
    padding-right: 3px;
    vertical-align: middle;
    color: #de4b39;
    font-weight: 900;
    position: absolute;
    right: 0;
    top: 0;
}