Abstract In the original paper ( Ecol. Model., 57: 193–219, 1991) a seven-component plankton-nutrient model was proposed so as to enable simulations of plankton growth and nutrient uptake in a coastal upwelling area. Since publication two coding errors have been discovered, affecting all results; these errors had the effect of reducing nitrogen uptake rates substantially. However on correcting the errors we discovered that the uptake rates calculated with the original coefficients are excessive. In this note the coefficients are revised and a simulation with the revised coefficients is compared with the original. The mathematical structure of the model is unchanged.