Hi Michael, The type for the enum, as given, will be signed int. Now if you want the enum to be ambiguous, you can do something like this: enum { Uno = -1, Dos, Tres = 0x80000000 }; That will cause an ambiguous overload of the signed & unsigned assignment operators, since the 0x80000000 will be taken to be an unsigned int as per the standard C/C++ interpretation rules. (Assuming a 32-bit int platform.) Is that the situation you are running into? You can "fix" it by doing: enum { Uno = -1, Dos, Tres = int(0x80000000) }; --Eljay