mod of negative number

[Craig Dillabaugh]

Why does the following program:

     \<code>
         import std.stdio;

         int main(string[] args) {
             uint Q = 7681;
             writeln("Val = ", -1 % Q);
             return 0;
         }
     \</code>

     Print
         Val = 5568


Was hoping for 1.

I assume it is an integer promotion issue, but I am unsure how to 
resolve.  I tried replacing the Q with to!int(Q) but this gave me 
-1, which is closer but not right either.