diff --git a/flashchips.h b/flashchips.h
index 81ce250..95277e6 100644
--- a/flashchips.h
+++ b/flashchips.h
@@ -34,6 +34,7 @@
  * SPI parts have 16-bit device IDs if they support RDID.
  */
 
+#define GENERIC_MANUF_ID	0xffff	/* Check if there is a vendor ID */
 #define GENERIC_DEVICE_ID	0xffff	/* Only match the vendor ID */
 
 #define ALLIANCE_ID		0x52	/* Alliance Semiconductor */