diff --git a/include/scsi-lowlevel.h b/include/scsi-lowlevel.h
index 06695b9..bdf590b 100644
--- a/include/scsi-lowlevel.h
+++ b/include/scsi-lowlevel.h
@@ -176,10 +176,6 @@ struct scsi_readtoc_list {
 	struct scsi_readtoc_desc desc[0];
 };
 
-struct scsi_write16_params {
-	uint64_t lba;
-	uint32_t num_blocks;
-};
 struct scsi_startstopunit_params {
 	int immed;
 	int pcm;
@@ -292,7 +288,6 @@ struct scsi_task {
 	int expxferlen;
 	unsigned char cdb[SCSI_CDB_MAX_SIZE];
 	union {
-		struct scsi_write16_params         write16;
 		struct scsi_startstopunit_params   startstopunit;
 		struct scsi_preventallow_params    preventallow;
 		struct scsi_orwrite_params         orwrite;
diff --git a/lib/scsi-lowlevel.c b/lib/scsi-lowlevel.c
index 005beca..dbb1d24 100644
--- a/lib/scsi-lowlevel.c
+++ b/lib/scsi-lowlevel.c
@@ -1284,9 +1284,6 @@ scsi_cdb_write16(uint64_t lba, uint32_t xferlen, int blocksize, int wrprotect, i
 	}
 	task->expxferlen = xferlen;
 
-	task->params.write16.lba        = lba;
-	task->params.write16.num_blocks = xferlen/blocksize;
-
 	return task;
 }