Negotiators for NBC’s “The Voice” and drivers repped by the Intl. Brotherhood of Teamsters Local 399 have reached a tentative contract agreement.

The pact was announced Sunday at a ratification meeting for Hollywood teamster drivers and four other basic craft unions for a three-year successor deal to their master contract according to Teamster attorney Joseph Kaplon.

Drivers for “The Voice,” which starts a new season in September, have not previously worked under a union contract and had been planning to strike the show this week.

The Intl. Alliance of Theatrical Stage Employees has an agreement that covers most below-the-line work on the NBC show.

The Teamsters and the IATSE have been ramping up their joint organizing efforts in the reality TV arena.

IATSE reached a three-year deal last summer covering crews for TV shows produced by FremantleMedia North America, including “American Idol,” “America’s Got Talent” and “The X Factor.” The two unions reached a deal in June with TNT reality series “The Great Escape.”

The effort comes two years after the unions entered into a formal “mutual assistance” agreement to work together toward common goals in an announcement by IATSE president Matthew Loeb and Teamsters general president Jim Hoffa.