It is shown how the "penguin" interaction, propo"ed by Shifman, Vainshtein, and Zakharov in the theory of nonleptonic weak decays, is consistent with the constraints of chiral symmetry. For the K-m. transition this involves including a diagram which was missed in previous work. The formulas for the %~2m matrix elements are found to be a factor of 2 larger than the original estimates using the vacuum-saturation method. In addition the equivalence of a procedure using a normalordered operator and the more standard technique is demonstrated.