diff --git a/addons/purchase_requisition/wizard/purchase_requisition_partner.py b/addons/purchase_requisition/wizard/purchase_requisition_partner.py
index a71b53e5ee9..fb88a21027f 100644
--- a/addons/purchase_requisition/wizard/purchase_requisition_partner.py
+++ b/addons/purchase_requisition/wizard/purchase_requisition_partner.py
@@ -38,7 +38,7 @@ class purchase_requisition_partner(osv.osv_memory):
         record_id = context and context.get('active_id', False) or False
         tender = self.pool.get('purchase.requisition').browse(cr, uid, record_id, context=context)
         if not tender.line_ids:
-            raise osv.except_osv(_('Error!'), _('Define products you want include in the call for bids.'))
+            raise osv.except_osv(_('Error!'), _('Define product(s) you want to include in the call for bids.'))
         return res
 
     def create_order(self, cr, uid, ids, context=None):