diff --git a/drivers/md/dm-bow.c b/drivers/md/dm-bow.c
index ee0e2b6fe450..75fc7dc83d7b 100644
--- a/drivers/md/dm-bow.c
+++ b/drivers/md/dm-bow.c
@@ -792,6 +792,7 @@ static int prepare_unchanged_range(struct bow_context *bc, struct bow_range *br,
 	 */
 	original_type = br->type;
 	sector0 = backup_br->sector;
+	bc->trims_total -= range_size(backup_br);
 	if (backup_br->type == TRIMMED)
 		list_del(&backup_br->trimmed_list);
 	backup_br->type = br->type == SECTOR0_CURRENT ? SECTOR0_CURRENT