Soft soils are one of the most problematic type of soils that exhibit low shear strength, high compressibility and high water content, thereby leading to low load bearing capacity and high tendency of settlement, which further leads to challenges in construction activities. Nanosilica has proved to be an efficient stabilizing material by various researchers that can be used for strength improvement and erosion control of the soil. A major demerit of the utilization of nanosilica in applications like subgrade stabilization is the formation of tension cracks during desiccation and shrinkage due to drying. This will also affect the erosion and slope stability and also cause distress of foundations constructed on such soils. Waste fibres when added to stabilized soils can be used to mitigate the cracks. This paper shows the effect of polypropylene fibres in mitigating the cracks developed in nanosilica treated soil and also estimates the extent of crack reduction by increasing the percentage of polypropylene fibres.