Let D = {z ∈ C, |z| < 1} and A(p) be the set of meromorphic functions in D possessing only simple pole at the point p with p ∈ (0 , 1). The aim of this paper is to give a criterion by mean of conditions on the parameters α, β ∈ C, λ > 0 and ∈ A(p) for functions in the class denoted P α,β ;h (p ; λ) of functions f ∈ A(p) satisfying a differential Inequality of the form α z f (z) + β z (z) ≤ λµ, z ∈ D to be univalent in the disc D, where µ = (1−p 1+p) 2 .