Matt Mills' late header gave Reading their first npower Championship victory of the season and left Leicester still struggling to find theirs as it finished 2-1 at the Walkers Stadium.
The defender was on hand to convert Brian Howard's right-wing corner with four minutes remaining. Gylfi Sigurdsson's second goal of the season put Reading in front midway through the first half before Lloyd Dyer marked his return from injury with the equaliser shortly after the break.
It needed fine saves from Adam Federici to deny Joao Moreno and substitute Matty Fryatt to preserve Reading's lead in injury time.
Sigurdsson scored after 22 minutes following good work by Jimmy Kebe down the right-hand side. The Icelander had the simple task of turning the ball into the net from close range. Shane Long came close to extending the lead with a header just before the break.
Dyer restored parity in the 52nd minute when his shot from just outside the box evaded the outstretched arm of Federici and found the bottom corner.
Reading continued to look the most likely to make a breakthrough and Kebe forced Conrad Logan into action midway through the second half. Mills put Reading back in front but this time Paulo Sousa's side were unable to respond despite the efforts of Moreno and Fryatt.