The glass-transition temperature (T-g) of the poly(vinylidene fluoride) (PVF2)-poly(methyl acrylate) (PMA) blends increase with aging time. The T-g versus log(time) plots are straight lines whose slope values depend on the head to head (H-H) defect content of PVF2 samples and on the composition of the blends. The values of polymer-polymer interaction parameters (chi) increase with an increase in the H-H defect of PVF2 for a fixed composition of the blend. Consequently, the T-g of the blend decreases with an increase in the H-H defect of the PVF2 sample. However, after aging for longer times this decrease of the T-g with H-H defects is lower than those of the unaged blends. The possible reasons are discussed.