diff --git a/dpgen/data/surf.py b/dpgen/data/surf.py
index 3ef7a03c9..e036e659e 100644
--- a/dpgen/data/surf.py
+++ b/dpgen/data/surf.py
@@ -23,7 +23,7 @@
 import dpgen.data.tools.fcc as fcc
 import dpgen.data.tools.hcp as hcp
 import dpgen.data.tools.sc as sc
-from dpgen import ROOT_PATH, dlog
+from dpgen import dlog
 from dpgen.dispatcher.Dispatcher import make_submission_compat
 from dpgen.generator.lib.utils import symlink_user_forward_files
 from dpgen.remote.decide_machine import convert_mdata