c = btrfs_alloc_free_block(trans, root, root->nodesize,
                                   root->root_key.objectid,
-                                  root_gen, lower_key.objectid, level,
-                                  root->node->start, 0);
+                                  root_gen, le64_to_cpu(lower_key.objectid),
+                                  level, root->node->start, 0);
        if (IS_ERR(c))
                return PTR_ERR(c);
 
 
        right = btrfs_alloc_free_block(trans, root, root->leafsize,
                                         root->root_key.objectid,
-                                        root_gen, disk_key.objectid, 0,
-                                        l->start, 0);
+                                        root_gen,
+                                        le64_to_cpu(disk_key.objectid),
+                                        0, l->start, 0);
        if (IS_ERR(right)) {
                BUG_ON(1);
                return PTR_ERR(right);