Unable to compare numbers if they are literally typed #12443

TypeScript Version: 2.1.1

Code

function compare(flag: boolean) {
    const offset = flag ? 1 : -1;
    return offset > 0;
}

Expected behavior:
Successfully compiles.

Actual behavior:
error TS2365: Operator '>' cannot be applied to types '1 | -1' and '0'.

Possibly helpful note: replacing > with + results in successful compilation.