The Holland international found himself in trouble at the club after revealing on his Twitter page last Friday that he had not been included in the party for the match at Stoke the following day.
However, the frustrated Dutchman has accepted his error and will now fight for a place in the squad to face Tottenham at home on Wednesday.
"He came to my office and apologised," said Benitez. "He knows he has made a mistake and for me that is enough and I don't need to talk too much about this.
"Ryan will be in the squad because we have 20 players ready for the training session tomorrow so it (selection) is between these 20 players."
Striker Fernando Torres (knee) and midfielders Steven Gerrard (hamstring) and Yossi Benayoun (rib) are all out.
Midfielders Alberto Aquilani and new signing Maxi Rodriguez could feature from the start if the Liverpool boss opts for a more attacking line-up at home.
Kick-off is at 8pm.
Reds (from): Reina, Degen, Skrtel, Carragher, Agger, Insua, Aquilani, Lucas, Rodriguez, Riera, Ngog, Kuyt, Aurelio, Cavalieri, Kyrgiakos, Pacheco, Spearing, Darby, Babel.