Shake Shack will shutter six underperforming California locations — the latest fast food chain to close restaurants after the state enacted its controversial $20 minimum wage.

The burger chain, which will close nine Shake Shacks overall, said the move was a result of a periodic evaluation of its portfolio of company-operated units, according to a filing with the Securities and Exchange Commission on Tuesday.

“These Shacks are not projected to provide acceptable returns in the foreseeable future,” the filing said.

Five of the doomed locations are in the Los Angeles area and another is in Oakland, lowering its total to 37 in the state — where wages for fast-food workers shot up to $20 an hour on April 1.

The company said its decision was based “in part due to changes in the trade area,” according to its filing.