Reading are suffering a barren spell in front of goal at present, with Kevin Doyle failing to find the target in 18 games and Dave Kitson hitting an alarming slump.
"I won't do it for this week," he said.
"I am mindful, though, that if things don't change I can call him back. I am aware of the situation and how he is doing.
"I speak with Alan Pardew (Charlton's boss) after every game and he's doing all right. He won't come back for this Saturday, but there are another three games and we'll see. All I am looking at now is this Saturday against Arsenal."