diff --git a/flashchips.c b/flashchips.c
index 65eb7f0..e97786f 100644
--- a/flashchips.c
+++ b/flashchips.c
@@ -3340,5 +3340,32 @@
 		.read		= NULL,
 	},
 
+	{
+		.vendor		= "Generic",
+		.name		= "unknown SPI chip (RDID)",
+		.bustype	= CHIP_BUSTYPE_SPI,
+		.manufacture_id	= GENERIC_MANUF_ID,
+		.model_id	= GENERIC_DEVICE_ID,
+		.total_size	= 0,
+		.page_size	= 256,
+		.tested		= TEST_BAD_PREW,
+		.probe		= probe_spi_rdid,
+		.erase		= NULL,
+		.write		= NULL,
+	},
+	{
+		.vendor		= "Generic",
+		.name		= "unknown SPI chip (REMS)",
+		.bustype	= CHIP_BUSTYPE_SPI,
+		.manufacture_id	= GENERIC_MANUF_ID,
+		.model_id	= GENERIC_DEVICE_ID,
+		.total_size	= 0,
+		.page_size	= 256,
+		.tested		= TEST_BAD_PREW,
+		.probe		= probe_spi_rems,
+		.erase		= NULL,
+		.write		= NULL,
+	},
+
 	{ NULL 	}
 };
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 */
diff --git a/spi.c b/spi.c
index 48be29a..29c202c 100644
--- a/spi.c
+++ b/spi.c
@@ -281,6 +281,11 @@
 	    GENERIC_DEVICE_ID == flash->model_id)
 		return 1;
 
+	/* Test if there is any vendor ID. */
+	if (GENERIC_MANUF_ID == flash->manufacture_id &&
+	    id1 != 0xff)
+		return 1;
+
 	return 0;
 }
 
@@ -340,6 +345,11 @@
 	    GENERIC_DEVICE_ID == flash->model_id)
 		return 1;
 
+	/* Test if there is any vendor ID. */
+	if (GENERIC_MANUF_ID == flash->manufacture_id &&
+	    id1 != 0xff)
+		return 1;
+
 	return 0;
 }