diff --git a/addons/purchase_requisition/models/purchase_requisition.py b/addons/purchase_requisition/models/purchase_requisition.py
index b3ab2a7f8fa..92b789c090f 100644
--- a/addons/purchase_requisition/models/purchase_requisition.py
+++ b/addons/purchase_requisition/models/purchase_requisition.py
@@ -75,6 +75,11 @@ class PurchaseRequisition(models.Model):
 
     @api.onchange('vendor_id')
     def _onchange_vendor(self):
+        if not self.vendor_id:
+            self.currency_id = self.env.company.currency_id.id
+        else:
+            self.currency_id = self.vendor_id.property_purchase_currency_id.id or self.env.company.currency_id.id
+
         requisitions = self.env['purchase.requisition'].search([
             ('vendor_id', '=', self.vendor_id.id),
             ('state', '=', 'ongoing'),