Walker was asked about tax collections coming in 2 percent less than estimates on Friday during an interview on WTMJ-AM.
Walker says he and Republicans who control the Legislature have been effective in keeping expenditures down, so that will be one approach during dealing with the shortfall. The budget is in balance this year, but based on current estimates it will now be $115 million in the red next year.
Walker says he expects the economy will continue to grow next year, which will also help the state's budget.
Democrats seized on the bad tax collection report, saying it shows Walker's policies are failing.