[Plugin: Contact Form 7] Trying to add input of type email to mobile site

Brief background: I have a client I’m making an iPhone-optimized website for. I’ve always used CF7 for all my sites, but for this project I need it to output email inputs as type “email”.

In text.php, I’ve changed this line:

$html = '<input type="text" name="' . $name . '" value="' . esc_attr( $value ) . '"' . $atts . ' />';

…to this:

if ( 'email' == $type || 'email*' == $type )
            $html = '<input type="email" name="' . $name . '" value="' . esc_attr( $value ) . '"' . $atts . ' />';
        else
            $html = '<input type="text" name="' . $name . '" value="' . esc_attr( $value ) . '"' . $atts . ' />';

But apparently it checks that string somewhere, as it’s not showing that field at all now.

Any idea what other code I would need to modify to accomplish this for this one project?