diff --git a/components/fatfs/src/diskio_sdmmc.c b/components/fatfs/src/diskio_sdmmc.c
index 51f0587b0..430f1ba42 100644
--- a/components/fatfs/src/diskio_sdmmc.c
+++ b/components/fatfs/src/diskio_sdmmc.c
@@ -64,10 +64,10 @@ DRESULT ff_sdmmc_ioctl (BYTE pdrv, BYTE cmd, void* buff)
         case CTRL_SYNC:
             return RES_OK;
         case GET_SECTOR_COUNT:
-            *((uint32_t*) buff) = card->csd.capacity;
+            *((DWORD*) buff) = card->csd.capacity;
             return RES_OK;
         case GET_SECTOR_SIZE:
-            *((uint32_t*) buff) = card->csd.sector_size;
+            *((WORD*) buff) = card->csd.sector_size;
             return RES_OK;
         case GET_BLOCK_SIZE:
             return RES_ERROR;
diff --git a/components/fatfs/src/diskio_spiflash.c b/components/fatfs/src/diskio_spiflash.c
index 2fdf075de..2f03a24e9 100644
--- a/components/fatfs/src/diskio_spiflash.c
+++ b/components/fatfs/src/diskio_spiflash.c
@@ -77,10 +77,10 @@ DRESULT ff_wl_ioctl (BYTE pdrv, BYTE cmd, void *buff)
     case CTRL_SYNC:
         return RES_OK;
     case GET_SECTOR_COUNT:
-        *((uint32_t *) buff) = wl_size(wl_handle) / wl_sector_size(wl_handle);
+        *((DWORD *) buff) = wl_size(wl_handle) / wl_sector_size(wl_handle);
         return RES_OK;
     case GET_SECTOR_SIZE:
-        *((uint32_t *) buff) = wl_sector_size(wl_handle);
+        *((WORD *) buff) = wl_sector_size(wl_handle);
         return RES_OK;
     case GET_BLOCK_SIZE:
         return RES_ERROR;