Either put your own favicon.ico
in the root of your domain (accessible via e.g. http://example.com/favicon.ico
) or link it in your HTML head:
<link rel="icon" href="http://example.com/favicon.ico" type="image/x-icon">
<link rel="shortcut icon" type="image/x-icon" href="img/favicon.ico" />
<link type="image/x-icon" href="img/favicon.ico" />