three-prong plug snapped, can I use two-prong plug with 2012 MBP?

[dmag]

Hi,

I busted one of the prongs off the three-prong plug for the adapter that goes with my 2012 Macbook Pro.

A friend gave me a two-prong plug/cord that fits the adapter fine.

Is there any problem using the old plug (two-prong) with this adapter and computer?

Thanks.