diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c
index ecf8ae3e5827..c5fd0df2193f 100644
--- a/fs/btrfs/block-group.c
+++ b/fs/btrfs/block-group.c
@@ -3783,6 +3783,8 @@ void btrfs_free_reserved_bytes(struct btrfs_block_group *cache,
 	spin_lock(&cache->lock);
 	if (cache->ro)
 		space_info->bytes_readonly += num_bytes;
+	else if (btrfs_is_zoned(cache->fs_info))
+		space_info->bytes_zone_unusable += num_bytes;
 	cache->reserved -= num_bytes;
 	space_info->bytes_reserved -= num_bytes;
 	space_info->max_extent_size = 0;