The present disclosure provides a method for receiving a physical downlink shared channel (PDSCH), the method being performed by a wireless device. The method may comprise the steps of determining the number of physical resource blocks (PRBs); and determining a transport block size (TBS) within the PDSCH on the basis of the determined number of the PRBs, wherein when the wireless device is an LC device or when the wireless device is set to CE so that the PDSCH is repeatedly received on a plurality of subframes, the number of PRBs used for determining the TBS can be calculated to be the same as the total number of PRBs that have been actually allocated for the PDSCH, regardless of whether the PDSCH is received in a TDD special subframe.