--- kernel/ietbsd.h.orig	2014-07-23 22:45:36.000000000 -0700
+++ kernel/ietbsd.h	2014-07-23 22:46:55.000000000 -0700
@@ -642,7 +642,9 @@
 #define SAM_STAT_RESERVATION_CONFLICT	SCSI_STATUS_RESERV_CONFLICT
 #define SAM_STAT_CHECK_CONDITION	SCSI_STATUS_CHECK_COND
 #define WRITE_VERIFY			0x2e
+#ifndef VERIFY_16
 #define VERIFY_16			0x8f
+#endif
 #define DATA_PROTECT			SSD_KEY_DATA_PROTECT
 #define NO_SENSE			SSD_KEY_NO_SENSE
 #define MEDIUM_ERROR			SSD_KEY_MEDIUM_ERROR