402(g) Excess distributed b/4 PYE when loss involved

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Excess Roth 402(g) of $1,000, loss of $100, net distribution equaled $900 and distribution took place before plan year end.

Am I coding the 1099R correct?

Box 1 Gross Distribution $900

Box 2a Taxable Amount $0

Box 5 Employee Contributions $1,000

I think box 1 and 2a are correct. My biggest concern is box 5.

ERISA outline book states when there is a loss only one 1099R is required, amount reported in gross box and taxable amount box is the amount of the distribution (provided a pre-tax contribution), with a separate statement instructing participant on proper reporting of deferrals and loss on personal tax return.

Thanks in advance for your imput.