Watford turned a one goal half time deficit into a 2-1 victory in front of the the live television camera's on Saturday evening.
"One or two needed shaking up at half time," Boothroyd told the club's official website.
"We needed to adjust what we did tactically and thankfully we did that.
Aidy: Credit To Ipswich
"You have to give credit to Ipswich, they were by far the better team in the first half, I was very disappointed with our first half performance. We were giving them presents in and around the last third during the first half.
"But we dug in and we came back and I would have been disappointed if we hadn't won because of the chances that we had in the match."