diff --git a/accounts/page/voucher_import_tool/voucher_import_tool.py b/accounts/page/voucher_import_tool/voucher_import_tool.py
index 91b6891..d62ec3c 100644
--- a/accounts/page/voucher_import_tool/voucher_import_tool.py
+++ b/accounts/page/voucher_import_tool/voucher_import_tool.py
@@ -87,7 +87,7 @@
 			
 			if d.ref_number:
 				if not d.ref_date:
-					raise webnotes.ValidationError, 
+					raise webnotes.ValidationError, \
 						"""Ref Date is Mandatory if Ref Number is specified"""
 				d.ref_date = parse_date(d.ref_date)