  We prove that the stochastic differential equation $$ Y_{s,t}(x) = Y_{s,s}(x)
+ \int_0^{t-s} f(Y_{s,s+u}(x)) dX_{s+u},
  Y_{s,s}(x)=x\in\R^d. $$ driven by a L\'evy process whose paths have finite
p-variation almost surely for some $p\in[1,2)$ defines a flow of locally
C^1-diffeomorphisms provided the vector field f is $\alpha$-Lipschitz for some
$\alpha>p$. Using a path- wise approach we relax the smoothness condition
normally required for a class of discontinuous semi-martingales.
