No Surname in H1B work permit.

I have applied for H1B with the First name as Rajat Kumar Mohan (without a surname).

My Passport too does not have a surname in it.



My employer informed me that life will be very difficult in U.S without a surname and asked me to get a passport with surname.



So, I re-applied for a passport with First name as Rajat Kumar and Surname as Mohan. Now I have a passport with first  name and surname. But my H1B work permit will have First name as Rajat Kumar Mohan and surname as FNU. 



Will this be a problem while I go for stamping ?