  We propose a generalisation of the Faddeev-Popov trick for Yang-Mills fields
in the Landau gauge. The gauge-fixing is achieved as a genuine change of
variables. In particular the Jacobian that appears is the modulus of the
standard Faddeev-Popov determinant. We give a path integral representation of
this in terms of auxiliary bosonic and Grassman fields extended beyond the
usual set for standard Landau gauge BRST. The gauge-fixing Lagrangian density
appearing in this context is local and enjoys a new extended BRST and anti-BRST
symmetry though the gauge-fixing Lagrangian density in this case is not BRST
exact.
