Some 140 workers at Garston call centre in Merseyside have voted by a magnificent 92 votes to nil to continue their fight.
The PCS union members deal with benefit enquiries in a Department for Work and Pensions (DWP) call centre.
They have struck for eight days already this year.
Workers plan to walk out on 22 December and 2 January.
The action has already won some gains.
Bosses wanted to transfer all staff to Birkenhead or Bootle call centres by February next year. The threat of compulsory moves to Birkenhead has been withdrawn.
And at least 45 posts have been found in South Liverpool for workers who can’t get to Bootle. Compulsory transfers before the end of the year have been halted.
The DWP group executive has backed calls in principal for strikes across the DWP call centre network in the north west of England in defence of improvements in working conditions.
The union also faces various attempts to hamstring its ability to fight.