401questions

Feel like I remember this coming up before but now I can't find anything. Bonuses not excluded comp. Employer pays a bonus, NOT off-cycle (i.e., paid with a regular paycheck, so EE just gets a larger paycheck for that pay period). Say Employee A has a $100/paycheck deferral election. Employer should just withhold "Normal" election correct? Since it is being paid in a regular paycheck, there would not be an increase in deferrals withheld?