An ad on behalf of Democratic Rep. Joe Kennedy misspelled the name of Worcester, Massachusetts, the second largest city in the state, when it appeared in the city’s own paper Sunday.

The ad, paid for by a local union supporting Kennedy’s Senate campaign against incumbent Sen. Ed Markey, said that he was “for Worchester,” despite no such city existing in Massachusetts.

Markey’s campaign was quick to point out the mistake, the Boston Herald reported.

John Walsh, Markey’s campaign manager, tweeted in response that “very [sic] time I plug #Worchester into the GPS, it keeps coming up [as] Enfield. Can anybody help a guy out?”

Kennedy sent an email in July criticizing Markey for ignoring residents in Enfield and other nearby towns, despite the fact that Enfield had been intentionally flooded to create the Quabbin Reservoir in the 1930s, the Herald reported.

Neither a local union, which sponsored the ad, nor Worcester’s paper, The Telegram, took responsibility for the typo.

A representative for the union said that the paper was an “Important community institution,” and called out Markey’s campaign for its statement with “multiple typos” of its own that “tried to criticize the Telegram’s error,” the Herald reported.

Meanwhile, a spokesman for the outlet said that it was “not taking responsibility,” according to the Herald.

The primary between the two has become more contentious, with Kennedy villainizing Markey’s supporters and Markey criticizing some of Kennedy’s most notable family members. Though Kennedy maintained a lead in the polls throughout much of the race, it has tightened considerably in its final weeks, with some recent polls showing Markey ahead by a widening margin.

Whomever wins the Sept. 1 primary will likely win the general election in November in solidly-Democratic Massachusetts.