diff --git a/scripts/geodata/chains/chains_tsv.py b/scripts/geodata/chains/chains_tsv.py
index 6b597cf4..595b7870 100644
--- a/scripts/geodata/chains/chains_tsv.py
+++ b/scripts/geodata/chains/chains_tsv.py
@@ -1,3 +1,4 @@
+import csv
 import os
 import glob
 import six