Steve Coppell told the Reading Official Website.
"Despite leaving in the summer, I know Reading has a big place in Glen's heart and I'd like to think he can make an impact in the next two months.
"He was a huge favourite in our promotion year and made countless goals with his ability. Hopefully now he will be fresh and inspired to make a difference.
"It's too early to say whether he's ready to challenge for a starting place. We'll look at his condition and take it from there."
Little will also be available to Reading if they are involved in the play-offs.
The 33-year-old former Burnley player added: "It was an easy decision to come back and I'll do everything I can to get Reading back into the Premier League.
"Even if I can just add 5% that might be the difference between gaining promotion and staying in the Championship and I'm really looking forward to it."