QCheckBox does not show check mark if indicator background set in style sheet

/* General */

QWidget:enabled
{
	alternate-background-color: #5b5b5b;
	background: #555;
	color: #fff;
}

QWidget:!enabled
{
	alternate-background-color: #4a4a4a;
	background: #555;
	color: gray;
}


/* QCheckBox */

QCheckBox:enabled
{
	color: white;
}

QCheckBox::indicator
{
	color: white;
	background: #444;
}