The Australia international made his comeback from a four-month absence with a knee injury as a late substitute in Saturday's 1-0 victory at Millwall.
Kisnorbo, who will celebrate his 28th birthday next week, is now targeting as many appearances as possible in Leicester's remaining eight League One games.
"It was great to be back. I felt really good at Millwall, very fit and keen to be playing again because it was very frustrating being out," Kisnorbo told the club's official website.
"I had the knee operation but then had a setback and it has taken a lot longer than expected. Fortunately, the lads were doing really well throughout that time and I couldn't wait to get back before the season finished.
"Now I want to play in as many of the remaining games as possible and see us get back up into the Championship and then hopefully try for promotion from there."