GAMS decimal numbers

I have the following code:

loop (d,
 rnd(d)=uniformInt(1,nd)
 );

I am going to use the integer numbers rnd(d) as an index of another set s(i). But for example when rnd(d)=34.000 however, it is integer, but s(34.000) has no valid index since, 34.000 is not 34 !! and GAMS shows a error message.