Shawcross has admitted he doesn't look out for the announcement of squads anymore because he's not anticipating being brought in from the cold.
But Hughes said: "He's been given 20-odd minutes in a difficult situation and a lot of criticism was thrown his way, very unfairly.
"We think it's harsh Ryan not getting a look in but we don't pick England squads.
"I accept he's been out injured for this one but I think if he'd been fit and well he must have come into Roy's thinking. It would be crazy if he hadn't."