Default value in UDF when Invoicing a delivery

Hello everyone,

I have a custom field on the SINVOICEV table.  I've added this field to the SIH0 screen and put a default to "2" (it is a yes/no).  If I create an invoice directly from the SIH0 screen the default works fine.  When I generate an invoice from a delivery the default value is not set.  Is there a way I can make sure that this custom field is defaulted correctly regardless of how the invoice is created?

Thanks a lot in advance,