diff --git a/bulk_insert.py b/bulk_insert.py
index c284ef6..10b4786 100644
--- a/bulk_insert.py
+++ b/bulk_insert.py
@@ -2,6 +2,7 @@
 import os
 import io
 import sys
+import math
 import struct
 import json
 from timeit import default_timer as timer