I have a Foreign Tax Carry-over as calculated on last year's return. I did not earn foreign income in 2017. Can I apply the carry over if I had no income?

Since I have no foreign income on 2017, Turbotax shows the column 15 of form 1116 zero. Then line 30 is calculated zero. Therefore I can not utilize the foreign tax credit carryover from previous year. How can I use my carry over if I have no foreign income in the tax year?