In conclusion, we have successfully developed the first stereoretentive TBAI-promoted transformation between chromone-3-carboxylic acids and aziridines under visible-light irradiation.` This process proceeds through the formation of radical intermediates and leads to the formation of biologically relevant and enantioenriched C-3-substituted chromenones. The reaction benefits from broad scope, operational simplicity as well as highly stereospecific character with retention of configuration being the outcome of the process. The mechanism of the reaction was confirmed by experimental studies involving mass spectroscopy.