diff --git a/sys/cam/ctl/ctl.c b/sys/cam/ctl/ctl.c
index b80a7d878746..74a780eb5572 100644
--- a/sys/cam/ctl/ctl.c
+++ b/sys/cam/ctl/ctl.c
@@ -10103,6 +10103,9 @@ ctl_inquiry_std(struct ctl_scsiio *ctsio)
 	} else if (port_type == CTL_PORT_SAS) {
 		/* SAS (no version claimed) */
 		scsi_ulto2b(0x0BE0, inq_ptr->version3);
+	} else if (port_type == CTL_PORT_UMASS) {
+		/* USB Mass Storage Class Bulk-Only Transport, Revision 1.0 */
+		scsi_ulto2b(0x1730, inq_ptr->version3);
 	}
 
 	if (lun == NULL) {
diff --git a/sys/cam/ctl/ctl.h b/sys/cam/ctl/ctl.h
index d9a4f5a6c18d..3370d15ee6a9 100644
--- a/sys/cam/ctl/ctl.h
+++ b/sys/cam/ctl/ctl.h
@@ -53,6 +53,7 @@ typedef enum {
 	CTL_PORT_INTERNAL	= 0x08,
 	CTL_PORT_ISCSI		= 0x10,
 	CTL_PORT_SAS		= 0x20,
+	CTL_PORT_UMASS		= 0x40,
 	CTL_PORT_ALL		= 0xff,
 	CTL_PORT_ISC		= 0x100 // FC port for inter-shelf communication
 } ctl_port_type;