The former Everton boss was pleased with the victory, but admitted his side were not at their best: "They were unbeaten in six or seven before this. We've not played that well, we can do an awful lot better, so it's nice to win when not at our best."
Royle also felt that his team improved in the second period of play at Portman Road: "In the second half we played better without being great. We had chances up front but defended comfortably.
"The results are everything in this sport, but I want us to play better. We're in an edgy position and have to win our home games as I expect Sunderland and Wigan to win theirs."
Meanwhile Leicester boss Craig Levein said: "We had chances as good as we've had in matches and but for good goalkeeping we could have had two or three goals.
"I am disappointed with our defending at set-pieces. We've marked well for corners previously, but lost out at them just lately. But in open play we were not put under pressure, except when we committed players forward.