I live and work overseas. My employer paid foreign taxes on my behalf for the first time this year, but on my W-2 they just added the taxes to "wages." Is this correct?

I work for a non-profit in Thailand and our registration status changed, so this year my employer, a US non-profit, had to pay $56,000 to the Thai Government on my behalf.  However, in my W-2 there is no mention of foreign taxes paid.  Rather, my employer just grossed up my "wages" and there's no mention of foreign taxes paid.  Did my employer make a mistake?  If so, how should my employer report foreign taxes paid on my behalf on my W-2?