CaTiO3:Pr3+ phosphor with a single red emission peak around 613 nm was co-doped with In3+ to charge compensate in the lattice sites where a trivalent ion Pr3+ substitutes a divalent Ca2+ ion. This phosphor was prepared via the solid state reaction process. The concentration of In3+ was varied from 0.05 to 0.3 mol% and it was found that the In3+ incorporation enhanced the intensity of the red emission and the afterglow decay time of the CaTiO3:Pr3+phosphor considerably. It is most likely that the incorporated In3+ charge compensators enhanced the luminescence intensity of the phosphor by neutralizing the additional positive charge generated by the Pr3+ions when substituting in the Ca2+ ions site. The orthorhombic CaTiO3 phase was identified by X-ray diffraction. Scanning Electron Microscopy images showed agglomerated particles with different shapes and sizes. A single red emission of Pr3+ around 613 nm and phosphorescence decay time of 6 minutes were measured using photoluminescence (PL) spectroscopy and afterglow measurements, respectively. Diffuse reflectance spectroscopy was used to determine the absorbing centres of the phosphor.