diff --git a/addons/hr_attendance/hr_attendance.py b/addons/hr_attendance/hr_attendance.py
index 07ef528a7c9..7699e7468d9 100644
--- a/addons/hr_attendance/hr_attendance.py
+++ b/addons/hr_attendance/hr_attendance.py
@@ -75,7 +75,7 @@ class hr_attendance(osv.osv):
             LIMIT 2 '''
             cr.execute(sql,(id,id))
             atts = cr.fetchall()
-            if not ((len(atts)==1 and atts[0][0] == 'sign_in') or (atts[0][0] != atts[1][0] and atts[0][1] != atts[1][1])):
+            if not ((len(atts)==1 and atts[0][0] == 'sign_in') or (len(atts)==2 and atts[0][0] != atts[1][0] and atts[0][1] != atts[1][1])):
                 return False
         return True