In this paper, a new control strategy of fault tolerance control (FTC) based on the fractional order PI controller (FOPI) for a dual star induction machine (DSIM) is proposed. A fault-tolerant command via Indirect rotor field-oriented control (IRFOC) strategy, based on a Proportional Resonant controller (PR), is designed. Using the residual signal generated from calculations passing through the PR controller, a fault feedforward compensation of the current components is introduced. The fractional order PI con-troller is used as a feedforward fractional order disturbance observer for the speed control loop which attempts to minimize the error induced by the defect. In this context, a fault-tolerant control scheme is obtained. Operation characteristics of the proposed fault tolerance control for a dual star induction machine drive are compared to the fault tolerant control based on conventional in-teger order PI (IOPI) to verify effectiveness of the proposed FTC scheme under various conditions by examining robustness of control in the presence of defects. Simulation results are obtained under Matlab/simulink environment to illustrate the proposed technique performance. Based on simulation results, the proposed FTC scheme provides significant superior responses com-pared with the conventional IRFOC scheme.