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The objective of this article is to make a correction to our previously published results  on the adaptive vibration suppression system. The vibration suppression system consists of a piezoelectric actuator of electric impedance ZS, which is connected to an active shunt circuit of electric impedance Z. In this situation, the effective spring constant of the piezoelectric actuator Keff is controlled by the value of the connected shunt impedance Z. It is shown in the article  that when the effective spring constant of the piezoelectric actuator Keff reaches small values (ideally zero value), the transmissibility of vibrations through the piezoelectric element greatly decreases.