diff --git a/drivers/mtd/spi/sf_internal.h b/drivers/mtd/spi/sf_internal.h
index 9642265bcf..6b2ab7b4a9 100644
--- a/drivers/mtd/spi/sf_internal.h
+++ b/drivers/mtd/spi/sf_internal.h
@@ -107,7 +107,7 @@ int sst_write_bp(struct spi_flash *flash, u32 offset, size_t len,
 #define JEDEC_MFR(info)		((info)->id[0])
 #define JEDEC_ID(info)		(((info)->id[1]) << 8 | ((info)->id[2]))
 #define JEDEC_EXT(info)		(((info)->id[3]) << 8 | ((info)->id[4]))
-#define SPI_FLASH_MAX_ID_LEN	5
+#define SPI_FLASH_MAX_ID_LEN	6
 
 struct spi_flash_info {
 	/* Device name ([MANUFLETTER][DEVTYPE][DENSITY][EXTRAINFO]) */