diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index 7c3fc76..0834a55 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -43,6 +43,7 @@
 #define	OPCODE_CHIP_ERASE	0xc7	/* Erase whole flash
chip */
 #define	OPCODE_SE		0xd8	/* Sector erase (usually
64KiB) */
 #define	OPCODE_RDID		0x9f	/* Read JEDEC ID */
+#define	OPCODE_RDID_NON_JEDEC	0x90	/* Read non-JEDEC ID */