diff --git a/sf_plan_management/models/base.py b/sf_plan_management/models/base.py
index 831b735c..9a9c5fe3 100644
--- a/sf_plan_management/models/base.py
+++ b/sf_plan_management/models/base.py
@@ -49,7 +49,7 @@ class ProcedureEquipmentResourceSetting(models.Model):
     @api.depends('working_calendar_id')
     def _onchange_working_calendar_id(self):
         for record in self:
-            record.working_shift_ids = record.working_calendar_id.working_shift_ids
+            record.working_shift_id = record.working_calendar_id.working_shift_ids