Hospitality chain JD Wetherspoon is offering its staff the option to move from zero-hours contracts to permanent hours.
Earlier in the year the company conducted a trial of the scheme, and will now be offering guaranteed hours to its 24,000 employees on zero-hours contracts.
They will be given fixed hours equating to around 70% of their typical working week, according to Buzzfeed.
During the trial, more than two-thirds of staff agreed to become permanent employees.
JD Wetherspoon has more staff members on zero-hours contracts than retailer Sports Direct, which has recently come under fire for the working conditions it provides.
The general secretary of the TUC is expected to criticise companies that treat their workers unfairly in a speech today.