Chicago Mayor Rahm Emanuel has reportedly left the door open to a tax on ride-hailing services such as Uber and Lyft to help tackle the city's budget.

The Chicago Tribune reports that the mayor on Tuesday did not directly answer questions on whether he is mulling such a tax. However, he pointed out that Ald. Ed Burke (14th) "has a view about a revenue-generating idea as it relates to ride-share and other services."

Burke, chairman of the council's Finance Committee, has suggested implementing a $1 city fee on cab and ride-hailing trips.

Emanuel is set to unveil his 2016 budget proposal on September 22.