diff --git a/unipay/paylog.py b/unipay/paylog.py
index 5e4e2f4..15a0e06 100644
--- a/unipay/paylog.py
+++ b/unipay/paylog.py
@@ -1,4 +1,5 @@
 from sqlor.dbpools import DBPools
+from appPublic.timeUtils import timestampstr
 
 class PaymentLog:
 	def __init__(self, env):