MILLWALL boss Kenny Jackett says he underestimated the importance of signing players with the right character last summer.
Jackett has vowed not to make the same mistake twice after admitting some of his pre-season additions had a detrimental effect on the togetherness of his squad.
The Lions brought in Ryan Allsop, Therry Racon, Darius Henderson, Jordan Stewart, Dany N'Guessan, Liam Feeney and Jay Simpson in the build-up to their 2011-12 campaign, in which they flirted dangerously with relegation before finishing 16th.
Jackett told the club's official site: "There's a certain type of player required to play for Millwall. Perhaps at times I've brought in better players but worse people.
"The mix of character and personality can sometimes help a smaller club overcome adversity. I certainly made the wrong assessment on those two things last summer.
"It took me a little while to address that and get a hard-working group together that cared for the club and produced big performances when they were needed. That's something I will adhere to going into the summer."