diff --git a/addons/hr_attendance/report/attendance_by_month.py b/addons/hr_attendance/report/attendance_by_month.py
index d4ce9cb148a..8e8f95c81e1 100644
--- a/addons/hr_attendance/report/attendance_by_month.py
+++ b/addons/hr_attendance/report/attendance_by_month.py
@@ -23,6 +23,7 @@ from datetime import datetime, timedelta
 from dateutil.relativedelta import relativedelta
 import time
 
+import openerp
 from openerp.report import report_sxw
 from openerp.report.interface import report_rml
 from openerp.report.interface import toxml