  We argue that gauge transformations with arbitrary fractional winding numbers
should be allowed in a non-Abelian gauge theory. This eliminates the
topological distinction between large and small gauge transformations. We prove
that the states which satisfy the Gauss's law constraint are strictly invariant
under gauge transformations, i.e. no phase shift occurs. In other words, the
vacuum theta-angle is zero. Our observation does not resolve the strong CP
problem.
