  The stress-energy tensor of a matter shell whose history coincides with a
null hypersurface in the Einstein-Cartan gravity is revisited. It is
demonstrated that with a proper choice for the torsion discontinuity taken to
be orthogonal to the null hypersurface and consistent with the antisymmetric
property of torsion tensor, the modified expression for the asymmetric
stress-energy tensor is automatically tangent to the hypersurface. The main
differences with respect to a previous work are addressed
