|Venue: The Den
JAMES Vaughan's second-half header condemned Millwall to their third straight league defeat under new manager Steve Lomas.
The Lions had carved out plenty of chances in a promising opening 45 minutes but fell behind shortly after the restart when Vaughan powered in Adam Hammill's corner.
One goal proved to be enough for the visitors and it left Millwall still searching for their first Championship point of the season.
Lomas made two changes from the side that started against Ipswich, with Alan Dunne and Jermaine Easter coming in for Jack Smith and Andy Keogh respectively.
Millwall had the ball in the net in just the fifth minute, but Easter's effort from close range was chalked off following a handball by Steve Morison in the build up.
Nick Bailey sliced well wide from distance before Morison powered a header over the bar from James Henry's cross as the Lions started the match on the front foot.
Richard Chaplow, who was playing on the right side of a four-man midfield, flashed a teasing ball across the face of goal in the 17th minute but nobody in a blue shirt was able to apply the finish.
Home debutant Shaun Derry then saw his drive deflected over the ball after Henry's corner caused a scramble in the area, before Stephen Bywater raced off his line to deny Huddersfield's James Vaughan.
The visitors then had a handball shout against Derry dismissed, and when Millwall counter-attacked Morison headed over from Dunne's cross. The Terriers went close to opening the scoring in the 34th minute when Oliver Norwood's dipping shot clipped the roof of the net.
Martin Paterson's effort was smothered by Bywater and Morison's header was tipped behind by Alex Smithies as the two sides exchanged chances in the close stages of the first half.
Millwall had the first chance of the second period when Henry curled over from Easter's cut-back, but Vaughan nodded in unmarked from a corner to break the deadlock in the 57th minute.
Vaughan went close to adding a second goal when he flicked the ball up to himself on the edge of the area and fired an acrobatic overhead kick a yard over.
The Lions looked devoid of ideas after falling behind and they struggled to carve out many opportunities of note, with Alan Dunne's dangerous cross the closest they came for over 20 minutes.
It was not until the 82nd minute that they mustered another effort on goal, but Morison headed straight at Smithies from Scott McDonald's centre.
With the final whistle fast approaching, Derry headed wide from Martin's corner. In five additional minutes, Smithies produced a fine save to deny Dunne and Nicky Bailey's half-volley sailed inches over as Huddersfield held on.