Watford boss Slavisa Jokanovic has expressed frustration with a lack of signings in January.
The Hornets brought in three players before Monday's transfer deadline day.
"I am not especially very happy with this window," Jokanovic told BBC Three Counties Radio.
"I am looking for another dressing room that can help us from outside our dressing room. Now the window is closed I must work with my boys and push them to fight until the end of the season."
Watford, currently sixth in the Championship, signed Mexico international wing-back Miguel Layun at the start of the month, and then finished their business for the window two weeks ago with the acquisitions of Vujadin Savic and Ben Watson.
But Jokanovic, who took over at Vicarage Road in October, is thought to have wanted to add more defensive and midfield options.
Transfers at the club are handled by the management staff of owner Gino Pozzo, sporting director Luke Dowling and chief executive Scott Duxbury.
"I recommended what we needed. I spoke about more players and we didn't make those steps," said Serb Jokanovic.
"It is history now and I am looking at my dressing room and my boys. In the future if there is a loan or something we will try to do that.
"All I can do is work with my team."