diff --git a/volumes.h b/volumes.h
index 0f82281f..68bd98ae 100644
--- a/volumes.h
+++ b/volumes.h
@@ -212,7 +212,6 @@ int btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
 int btrfs_alloc_data_chunk(struct btrfs_trans_handle *trans,
 			   struct btrfs_root *extent_root, u64 *start,
 			   u64 num_bytes, u64 type, int convert);
-int btrfs_read_super_device(struct btrfs_root *root, struct extent_buffer *buf);
 int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
 		       int flags);
 int btrfs_close_devices(struct btrfs_fs_devices *fs_devices);