The Red Devils have not conceded in a record 12 successive Premier League games since United lost 2-1 to Arsenal at the Emirates Stadium on 8th November.
Former United striker David Sadler believes the record is hampering his old club's normally free-flowing style.
He says that the sooner it is broken, the more likely Ferguson's team will end a glut of 1-0 wins.
While Ferguson does agree an element of caution crept into last Saturday's win over Everton, he is happy for his team to keep adding to the record.
Galvanising effectHe said: "The record is having a galvanising effect but I also thought last week we just started to protect it a little bit.
"Our first-half performance was excellent against Everton. We played some really good football and created a lot of opportunities.
"But towards the middle of the game I sensed we were starting to drop off a little bit. I think that was to do with keeping the record."
Dutch keeper Edwin van der Sar also now holds the Premier League record of not conceding for 1,122 minutes.
A British record is on offer for the 38-year-old should he keep Sunday's opponents West Ham at bay for at least 75 minutes at Upton Park, live on Sky Sports 1 and HD1.
No problemBut Ferguson cannot see a problem in trying to protect the side's record, believing it will make his team harder to beat.
"It is a natural thing, particularly for Edwin who knows he is going for an exceptional record," said the United chief.
"The defenders are in that position as well, so caution is bound to come into it. I am not concerned."