diff --git a/drivers/flash/flash_spi.c b/drivers/flash/flash_spi.c
index f4cbf65159..684ee06d71 100644
--- a/drivers/flash/flash_spi.c
+++ b/drivers/flash/flash_spi.c
@@ -57,7 +57,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 /* Mode setting comands */
 #define FLASH_CMD_DP 0xB9  /* DP (Deep Power Down) */
-#define FLASH_CMD_RDP 0xAB /* RDP (Release form Deep Power Down) */
+#define FLASH_CMD_RDP 0xAB /* RDP (Release from Deep Power Down) */
 
 /* Status register */
 #define FLASH_FLAG_WIP 0x01 /* Write in progress bit */
diff --git a/drivers/flash/flash_spi.h b/drivers/flash/flash_spi.h
index abe95e955e..87460fc210 100644
--- a/drivers/flash/flash_spi.h
+++ b/drivers/flash/flash_spi.h
@@ -74,21 +74,21 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
     The sector size of the FLASH in bytes, as specified in the datasheet.
 */
 #ifndef EXTERNAL_FLASH_SECTOR_SIZE
-#    define EXTERNAL_FLASH_SECTOR_SIZE (4 * 1024)
+#    define EXTERNAL_FLASH_SECTOR_SIZE (4 * 1024L)
 #endif
 
 /*
     The block size of the FLASH in bytes, as specified in the datasheet.
 */
 #ifndef EXTERNAL_FLASH_BLOCK_SIZE
-#    define EXTERNAL_FLASH_BLOCK_SIZE (64 * 1024)
+#    define EXTERNAL_FLASH_BLOCK_SIZE (64 * 1024L)
 #endif
 
 /*
     The total size of the FLASH in bytes, as specified in the datasheet.
 */
 #ifndef EXTERNAL_FLASH_SIZE
-#    define EXTERNAL_FLASH_SIZE (512 * 1024)
+#    define EXTERNAL_FLASH_SIZE (512 * 1024L)
 #endif
 
 /*