The paper is devoted to a generalization of the Myshkis's 3/2 stability theorem. This theorem gives an exact stability boundary for a scalar equation with a real parameter and an arbitrary delay, which is bounded by a prescribed value. In our paper, we consider the equation with complex parameter that opens up a direct opportunity for the analysis of systems of several equations. Via the Razumikhin approach, a stability region (not necessarily exact) is obtained, it is shown that its boundary can be expressed in radicals, and in the limit case the result coincides with the one of Myshkis.