Striker David Nugent believes having Chris Wood back in the Leicester City side would be "massive."
Wood has missed City's last two games with a knee injury, both of which ended in defeat at the hands of Peterborough and Huddersfield.
The duo have developed an instant understanding with the pair scoring nine goals since Wood's arrival at the King Power Stadium on New Year's Day.
And with Wood being confirmed as fully fit ahead of tonight's clash with Charlton, they both have the chance to add to that impressive tally.
"It would be massive to get Chris back," said Nugent.
"We have struggled in the last two games when he hasn't been playing and it has showed.
"Hopefully, he will be back tonight and we can resume our partnership where we left off."
Both players acknowledged the meeting with former City player-coach Chris Powell's Charlton will not be a walk in the park.
"It will be tough game," he said. "They are a good side.
"But they are inconsistent at the moment and our home form is decent so, hopefully, we can take the game to them, win it and claim the three points."
Wood agrees that tonight's clash will be a challenge.
"They are a very strong side," he said. "I faced them early on in the season when I was playing for Millwall.
"They are a very strong and determined side. It will be a very difficult game for us but, hopefully, a good test.
"It is going to be another big game for us. It is another step in our push for promotion and it will be nice if we can get back to winning ways, which is what we are aiming for.
"The message has been just keep going. It wasn't as if we didn't play well in those games (against Peterborough and Huddersfield). We did play well and created chances. It is one of those things. We need to take our chances."
The New Zealand international also called on the City fans to get behind their side.
"They are the 12th man for us," he said.
"When we go on the pitch we do all we can to win, but if we go behind they get behind us and we can go up another gear."
Leicester City's home clash with Birmingham has been moved from Saturday, April 13, to Friday, April 12.
It is to be shown live on Sky Sports (7.45 kick-off).
City now have only two home games left on a Saturday from now until the end of the season.
Trialist Conor Clifford bagged the winner as Leicester City's development squad came from behind to beat Birmingham City 2-1 yesterday.
The Republic of Ireland under-21 player, and Chelsea academy product, sealed the victory in the 76th minute after Tom Hopper had levelled the scoring with a 20-yard volley.