diff --git a/lib/scsi/scsi_bdev.c b/lib/scsi/scsi_bdev.c
index 2a4487c62..53748870f 100644
--- a/lib/scsi/scsi_bdev.c
+++ b/lib/scsi/scsi_bdev.c
@@ -399,8 +399,8 @@ bdev_scsi_inquiry(struct spdk_bdev *bdev, struct spdk_scsi_task *task,
 		case SPDK_SPC_VPD_EXTENDED_INQUIRY_DATA: {
 			struct spdk_scsi_vpd_ext_inquiry *vext = (struct spdk_scsi_vpd_ext_inquiry *)vpage;
 
-			memset(vext, 0, sizeof(*vext));
 			hlen = 4;
+			memset((uint8_t *)vext + hlen, 0, sizeof(*vext) - hlen);
 
 			/* RTO(3) GRD_CHK(2) APP_CHK(1) REF_CHK(0) */