diff --git a/yuthon_salary/wizard/salary_compute_wizard.py b/yuthon_salary/wizard/salary_compute_wizard.py
index 23c4f1331..6c3dd6fca 100644
--- a/yuthon_salary/wizard/salary_compute_wizard.py
+++ b/yuthon_salary/wizard/salary_compute_wizard.py
@@ -218,8 +218,9 @@ class SalaryComputeWizard(models.Model):
                                     result = 0
                             elif field_name in ['commuting_allowance', 'seniority_salary']:
                                 if work_days != days:
+                                    result = line.total * internship_days / days + line.total * work_days / days
+                                else:
                                     result = line.total * internship_days / days
-
                             elif field_name in ['rank_salary', 'base_salary']:
                                 if work_days != days:
                                     result = round(math.ceil(line.total * 0.8) * internship_days / days + line.total * work_days / days)