  The fivebrane in M-theory comes equipped with a higher order gauge field
which should have a formulation in terms of a 2-gerbe on the fivebrane. One can
pose the question if the BV-quantization scheme for such a higher order gauge
theory should differ from the usual BV-algebra structure. We give an algebraic
argument that this should, indeed, be the case and a fourth order equation
should appear as Master equation, in this case. We also discover a second order
term in this equation which seems to indicate that deformation theory (i.e.
solving the Master equation) in this case involves a nonlinear algebraic theory
which goes beyond complexes and cohomology.
