FPGA编译时出现的问题，请教各位如何修改

这是出现的问题Analyzing top module .
ERROR:Xst:867 - "debounce_button.v" line 164: Operator % is only supported when the second operand is a power of 2.
ERROR:Xst:867 - "debounce_button.v" line 179: Operator % is only supported when the second operand is a power of 2.