Job Mileage - Employer reimbursed less than the standard rate.

I traveled for my job in my personal vehicle 1753 miles in 2016 and my mileage is officially tracked by my employer. The 2016 standard rate for reimbursement is $0.54 a mile. My employer however has already reimbursed me $0.51 a mile. What is the correct way to deduct the remaining difference of $0.03 a mile?