ForEx gain/loss impact on Fixed Asset

Hi,

We have loan in foreign currency against fixed asset, these loans are payable (unpaid) at the end of the year, therefore, we have to reinstate the balance of these loan accounts and post its unrealized gain/loss to Fixed Assets.

Loan accounts are normal GL accounts and maintained in foreign currency.

Please suggest how can I map the same in SAP.

Thanks and regards

Sonu Tomar