Use Nullables with DotNetInterop

I just faced a problem where i had to call a webservice through a WCF function that accepts a System.Nullable'1 as parameter (i actually wanted to just pass a simple integer). I tried to declare a systemnullable variable but the following code does not compile
Systemnullable := myinteger;
After some headbanging and some luck, i just found that if you box the integer into a variant, nav compiles and the code works...ok!
myvariant := myinteger;
systemnullable := myvariant;
I hope it helps somebody in the future, bye!