diff --git a/btrfstune.c b/btrfstune.c
index 580fb401..2d85b041 100644
--- a/btrfstune.c
+++ b/btrfstune.c
@@ -177,10 +177,9 @@ out:
 	return ret;
 }
 
-static int change_device_uuid(struct btrfs_root *root, struct extent_buffer *eb,
+static int change_device_uuid(struct btrfs_fs_info *fs_info, struct extent_buffer *eb,
 			      int slot)
 {
-	struct btrfs_fs_info *fs_info = root->fs_info;
 	struct btrfs_dev_item *di;
 	int ret = 0;
 
@@ -216,7 +215,7 @@ static int change_devices_uuid(struct btrfs_fs_info *fs_info)
 		if (key.type != BTRFS_DEV_ITEM_KEY ||
 		    key.objectid != BTRFS_DEV_ITEMS_OBJECTID)
 			goto next;
-		ret = change_device_uuid(root, path.nodes[0], path.slots[0]);
+		ret = change_device_uuid(fs_info, path.nodes[0], path.slots[0]);
 		if (ret < 0)
 			goto out;
 next: