  In this work we discuss the dynamical generation of mass in a deformed ${\cal
N}=1$ supersymmetric nonlinear sigma model in a two-dimensional ($D=1+1$)
space-time. We introduce the deformation by imposing a constraint that softly
breaks supersymmetry. Through the tadpole method, we compute the effective
potential at leading order in $1/N$ expansion showing that the model exhibit a
dynamical generation of mass to the matter fields. Supersymmetry is recovered
in the limit of the deformation parameter going to zero.
