The Republic of Ireland winger turned away and bowed his head while God Save the Queen was played and has since been spoken to by Pulis who has urged him to watch his behaviour in the future.
"I didn't see the situation but I had a chat with him and explained what we do as a football club and the way we are and I think he's fine with everything," said Pulis.
"It's just about integrating him and him understanding the rules we work to at the club and we're all together on and off the pitch.
"I've seen the pictures and he's got to turn towards the flag like everybody else has and he recognises that.
"He thought he was OK to close his eyes and put his head down in respect of both anthems. The trouble is he's got to face the flag."