Ings scored his sixth league goal of the campaign against Brighton and Hove Albion in November, but has not found the net in his last four games.
“Definitely after his injury it’s normal that he’s not in his 100% rhythm, but it’s important that he stays fit now and has enough time to recover for the game against Liverpool,” Hasenhuettl told reporters.
“I’m happy to have him back and we definitely must have more punch up front to score more goals in future, but this will come I’m sure.
Southampton have not scored in their last three league games, drawing two of them and losing 1-0 to Manchester City, to sit ninth. Hasenhuettl said he was delighted with his players at the other end of the pitch.