diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index ed82edf987f44bc8499121c1f7e19942573134dc..18231194835e24604bbddb9f53fe2d34c7f0c1f9 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -4791,7 +4791,6 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
 						   j * stripe_size;
 		}
 	}
-	map->sector_size = info->sectorsize;
 	map->stripe_len = BTRFS_STRIPE_LEN;
 	map->io_align = BTRFS_STRIPE_LEN;
 	map->io_width = BTRFS_STRIPE_LEN;
@@ -6443,7 +6442,6 @@ static int read_one_chunk(struct btrfs_fs_info *fs_info, struct btrfs_key *key,
 	map->num_stripes = num_stripes;
 	map->io_width = btrfs_chunk_io_width(leaf, chunk);
 	map->io_align = btrfs_chunk_io_align(leaf, chunk);
-	map->sector_size = btrfs_chunk_sector_size(leaf, chunk);
 	map->stripe_len = btrfs_chunk_stripe_len(leaf, chunk);
 	map->type = btrfs_chunk_type(leaf, chunk);
 	map->sub_stripes = btrfs_chunk_sub_stripes(leaf, chunk);
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 181b365cab0cb1f5026130f90002a56238aebe68..eebe2f871dc71d0cb41df044c1896041aa0372bb 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -353,7 +353,6 @@ struct map_lookup {
 	int io_align;
 	int io_width;
 	u64 stripe_len;
-	int sector_size;
 	int num_stripes;
 	int sub_stripes;
 	struct btrfs_bio_stripe stripes[];