diff --git a/module/zfs/zvol.c b/module/zfs/zvol.c
index b073a3c5e..2b99f44de 100644
--- a/module/zfs/zvol.c
+++ b/module/zfs/zvol.c
@@ -1389,7 +1389,7 @@ __zvol_create_minor(const char *name, boolean_t ignore_snapdev)
 
 	set_capacity(zv->zv_disk, zv->zv_volsize >> 9);
 
-	blk_queue_max_hw_sectors(zv->zv_queue, DMU_MAX_ACCESS / 512);
+	blk_queue_max_hw_sectors(zv->zv_queue, (DMU_MAX_ACCESS / 4) >> 9);
 	blk_queue_max_segments(zv->zv_queue, UINT16_MAX);
 	blk_queue_max_segment_size(zv->zv_queue, UINT_MAX);
 	blk_queue_physical_block_size(zv->zv_queue, zv->zv_volblocksize);