BOSTON -- As U.S. Senate candidate Martha Coakley went on the attack Tuesday with a sharply-worded television ad attacking her Republican rival Scott Brown, the rush to production led to a misspelling of the state she hopes to represent in Washington.

Coakley's campaign launched a negative ad asking, "Who is Scott Brown really? A Republican in lockstep with Washington Republicans."

At the end of the advertisement, where a candidate must disclose who paid for the ad, the copy read "paid for by Massachusettes (sic) Democratic Party."

When asked for comment, campaign spokesman Corey Welford offered a terse reply, "It has been corrected."

A new version of the ad with the correct spelling of Massachusetts was sent to Boston television stations Tuesday morning.