diff --git a/sys/bus/cam/scsi/scsi_sg.c b/sys/bus/cam/scsi/scsi_sg.c
--- a/sys/bus/cam/scsi/scsi_sg.c
+++ b/sys/bus/cam/scsi/scsi_sg.c
@@ -532,7 +532,7 @@
 			dir = CAM_DIR_IN;
 			break;
 		case SG_DXFER_TO_FROM_DEV:
-			dir = CAM_DIR_IN | CAM_DIR_OUT;
+			dir = CAM_DIR_IN;
 			break;
 		case SG_DXFER_NONE:
 		default: