diff --git a/sys/dev/usb/umass.c b/sys/dev/usb/umass.c
index 01dea4bd528f..7118f24e3118 100644
--- a/sys/dev/usb/umass.c
+++ b/sys/dev/usb/umass.c
@@ -202,6 +202,7 @@ typedef struct {
 typedef struct {
 	uDWord		dCSWSignature;
 #	define CSWSIGNATURE	0x53425355
+#	define CSWSIGNATURE_IMAGINATION_DBX1	0x43425355
 #	define CSWSIGNATURE_OLYMPUS_C1	0x55425355
 	uDWord		dCSWTag;
 	uDWord		dCSWDataResidue;
@@ -347,6 +348,10 @@ Static struct umass_devdescr_t umass_devdescrs[] = {
 	  UMASS_PROTO_ATAPI | UMASS_PROTO_CBI_I,
 	  NO_TEST_UNIT_READY | NO_START_STOP
 	},
+	{ USB_VENDOR_IMAGINATION, USB_PRODUCT_IMAGINATION_DBX1, RID_WILDCARD,
+	  UMASS_PROTO_SCSI | UMASS_PROTO_BBB,
+	  WRONG_CSWSIG
+	},
 	{ USB_VENDOR_INSYSTEM, USB_PRODUCT_INSYSTEM_USBCABLE, RID_WILDCARD,
 	  UMASS_PROTO_ATAPI | UMASS_PROTO_CBI,
 	  NO_TEST_UNIT_READY | NO_START_STOP | ALT_IFACE_1
@@ -1620,9 +1625,12 @@ umass_bbb_state(usbd_xfer_handle xfer, usbd_private_handle priv,
 		DIF(UDMASS_BBB, umass_bbb_dump_csw(sc, &sc->csw));
 
 		/* Translate weird command-status signatures. */
-		if ((sc->quirks & WRONG_CSWSIG) &&
-		    UGETDW(sc->csw.dCSWSignature) == CSWSIGNATURE_OLYMPUS_C1)
-			USETDW(sc->csw.dCSWSignature, CSWSIGNATURE);
+		if (sc->quirks & WRONG_CSWSIG) {
+			uDWord dCSWSignature = UGETDW(sc->csw.dCSWSignature);
+			if (dCSWSignature == CSWSIGNATURE_OLYMPUS_C1 ||
+			    dCSWSignature == CSWSIGNATURE_IMAGINATION_DBX1)
+				USETDW(sc->csw.dCSWSignature, CSWSIGNATURE);
+		}
 
 		int Residue;
 		Residue = UGETDW(sc->csw.dCSWDataResidue);
diff --git a/sys/dev/usb/usbdevs b/sys/dev/usb/usbdevs
index 38e4f44f2fc9..a8ed6e759c6a 100644
--- a/sys/dev/usb/usbdevs
+++ b/sys/dev/usb/usbdevs
@@ -506,6 +506,7 @@ vendor LINKSYS4		0x13b1	Linksys
 vendor SHARK		0x13d2	Shark
 vendor SILICOM		0x1485	Silicom
 vendor RALINK		0x148f	Ralink Technology
+vendor IMAGINATION	0x149a	Imagination Technologies
 vendor CONCEPTRONIC	0x14b2	Conceptronic
 vendor SILICONPORTALS	0x1527	Silicon Portals
 vendor SOHOWARE		0x15e8	SOHOware
@@ -978,6 +979,9 @@ product HP2 C500		0x6002	PhotoSmart C500
 /* IBM Corporation */
 product IBM USBCDROMDRIVE	0x4427	USB CD-ROM Drive
 
+/* Imagination Technologies products */
+product IMAGINATION DBX1	0x2107	DBX1 DSP core
+
 /* Inside Out Networks products */
 product INSIDEOUT EDGEPORT4	0x0001	EdgePort/4 serial ports