diff --git a/payroll.py b/payroll.py
index 4c37ac9..f758aaf 100644
--- a/payroll.py
+++ b/payroll.py
@@ -793,8 +793,8 @@ class PayrollGroup(Wizard):
         payrolls_period = Payroll.search([
             ('period', '=', self.start.period.id),
         ])
-        employees_w_payroll = [p.employee.id for p in payrolls_period]
 
+        employees_w_payroll = [p.employee.id for p in payrolls_period if p.employee.contract.id == p.contract.id]
         dom_employees = self.get_employees_dom(employees_w_payroll)
         payroll_to_create = []