Millwall will do all they can to hang on to prize asset Steve Morison, insists Manager Kenny Jackett, as the Lions look to strengthen rather than weaken their squad during the January transfer window in the hope of clinching a second successive promotion.

In-demand 27-year-old striker Morison has been a revelation since arriving at the New Den in a £130,000 move from Stevenage Borough in the summer of 2009.

He hit 23 goals as the Lions climbed up to the npower Championship via last term's League 1 Play-Offs and has hit the net 11 times in the current campaign, earning himself his first four Welsh international caps in the process and helping his team to sit only three points below the Play-Off places just past the season's half-way stage.

He has recently been linked with a move to Premier League club Fulham but Jackett, after seeing his team extend their unbeaten run to eight matches with a goalless draw at Derby County, said: "There's been a lot of speculation, but as Manager I don't want to sell him and I know that my chairman and the board feel the same way.

"It's not something we're planning or contemplating. We want to add one or two and although we won't be undertaking major surgery (in the transfer window) we need to complement the side to make sure we have balance and competition for places."

One player who Jackett would like to sign immediately is Southampton striker Jason Puncheon, whose six-week loan at Millwall has just ended after seven games brought him five goals and a place on the Manager's 'wanted' list.

Jackett said: "Jason says he's enjoyed his time with us and that's shown in his performances. He's felt comfortable here, he's fitted in well and we'll try to take him if we can, either by buying him or extending the loan. We've been in touch numerous times with Southampton, but I've got no news just yet."

An injury picked up in Saturday's 3-0 win against Crystal Palace meant that Puncheon was forced out of what would have been his last on-loan Millwall appearance in Bank Holiday Monday's goalless draw with Derby.

Morison, meanwhile, turned out at Pride Park despite suffering the affects of a virus which had prevented him from appearing against Palace.

In spite of being without their two leading goalscorers the visitors should have beaten the Rams, but Jackett was content with a point as his team showed that they will be good enough to challenge for a top six place in the second half of the season.

The Manager said: "We had our chances to win the game, but the result keeps our run going and it's a good run performance-wise as well as results-wise.

"We want to keep the run going and to improve a little bit. In our first year up (in the Championship) it would be foolish of me to start talking about promotion, but if you're in that pack then you're not far away from being successful.

"We have to keep our foot on the accelerator and keep trying to push forward. In the second half of the season we've got to take the good things that we've done so far, strengthen and improve, and keep going with the same attitude."

For all the latest news on Millwall please click here