diff --git a/src/main/drivers/sdcard/sdmmc_sdio_f4xx.c b/src/main/drivers/sdcard/sdmmc_sdio_f4xx.c
index 8999cdd7197..c0076a5682d 100644
--- a/src/main/drivers/sdcard/sdmmc_sdio_f4xx.c
+++ b/src/main/drivers/sdcard/sdmmc_sdio_f4xx.c
@@ -772,7 +772,7 @@ SD_Error_t SD_GetCardInfo(void)
         SD_CardInfo.CardCapacity  = (SD_CardInfo.SD_csd.DeviceSize + 1) ;
         SD_CardInfo.CardCapacity *= (1 << (SD_CardInfo.SD_csd.DeviceSizeMul + 2));
         SD_CardInfo.CardBlockSize = 1 << (SD_CardInfo.SD_csd.RdBlockLen);
-        SD_CardInfo.CardCapacity *= SD_CardInfo.CardBlockSize;
+        SD_CardInfo.CardCapacity = SD_CardInfo.CardCapacity * SD_CardInfo.CardBlockSize / 512; // In 512 byte blocks
     }
     else if (SD_CardType == SD_HIGH_CAPACITY) {
         // Byte 7