The problem of achieving output-decoupling for linear single-input single-output.systems subjected to unknown step disturbances is considered. The adaptive; control scheme of Elliott and Wolovich is used, together with integral feedback, to obtain arbitrarily t he desired dynamic behaviour of the output response. The proposed scheme uses only input and output measurements and is globally asymptotically stable. A study employing a second-order plant is presented to illustrate the technique and its properties.