Mortgage Grant on form 1099-MISC

Hello all.  I received a mortgage grant from my credit union when I bought my home.  I received a form 1099-MISC with this amount.  I've entered it as "other common income" form 1099-MISC on TurboTax, but it's dramatically increasing my federal tax due amount.  I suspect the system thinks it's self-employment income and is assuming I need to pay social security and medicare taxes on it.  Is this correct?  Is there another way I should be entering it?