diff --git a/models/scop_contribution.py b/models/scop_contribution.py
index 4c95df0fbc3ad3a50ce8562a6e250ef63a4d2cd7..0d49ad3dcbfbd678b6fdce4a6a4089a8e432edf6 100644
--- a/models/scop_contribution.py
+++ b/models/scop_contribution.py
@@ -20,6 +20,7 @@ class ScopContributions(models.Model):
         string="Type de cotisation",
         ondelete='restrict', index=True)
     year = fields.Integer("Année", index=True)
+    year_str = fields.Char("Année (txt)",)
     calculation_date = fields.Datetime("Date calcul cotisation")
     loss = fields.Boolean("Perte")
     amount_calculated = fields.Integer("Montant calculé")