diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 5b8ef8eb35218e0f595ee93069fc1ccab49c6b1e..ec42a24e935e8345c771ece0a40478d6e01aa669 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1078,7 +1078,7 @@ struct btrfs_fs_info {
 	 * is required instead of the faster short fsync log commits
 	 */
 	u64 last_trans_log_full_commit;
-	unsigned long mount_opt:21;
+	unsigned long mount_opt;
 	unsigned long compress_type:4;
 	u64 max_inline;
 	u64 alloc_start;