diff --git a/cotisations/migrations/0042_auto_20190325_0840.py b/cotisations/migrations/0042_auto_20190325_0840.py
new file mode 100644
index 00000000..e67a8f9c
--- /dev/null
+++ b/cotisations/migrations/0042_auto_20190325_0840.py
@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.7 on 2019-03-25 07:40
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('cotisations', '0041_auto_20190325_0837'),
+    ]
+
+    operations = [
+        migrations.RenameField(
+            model_name='cotisation',
+            old_name='vente',
+            new_name='purchase',
+        ),
+    ]
diff --git a/cotisations/models.py b/cotisations/models.py
index a9da6d2c..78ad39c9 100644
--- a/cotisations/models.py
+++ b/cotisations/models.py
@@ -872,8 +872,7 @@ class Cotisation(RevMixin, AclMixin, models.Model):
         ('All', _("Both of them")),
     )
 
-    # TODO : change vente to purchase
-    vente = models.OneToOneField(
+    purchase = models.OneToOneField(
         'Vente',
         on_delete=models.CASCADE,
         null=True,
@@ -903,8 +902,8 @@ class Cotisation(RevMixin, AclMixin, models.Model):
         if not user_request.has_perm('cotisations.change_cotisation'):
             return False, _("You don't have the right to edit a subscription.")
         elif not user_request.has_perm('cotisations.change_all_cotisation') \
-                and (self.vente.invoice.control or
-                     not self.vente.invoice.valid):
+                and (self.purchase.invoice.control or
+                     not self.purchase.invoice.valid):
             return False, _("You don't have the right to edit a subscription "
                             "already controlled or invalidated.")
         else:
@@ -914,7 +913,7 @@ class Cotisation(RevMixin, AclMixin, models.Model):
         if not user_request.has_perm('cotisations.delete_cotisation'):
             return False, _("You don't have the right to delete a "
                             "subscription.")
-        if self.vente.invoice.control or not self.vente.invoice.valid:
+        if self.purchase.invoice.control or not self.purchase.invoice.valid:
             return False, _("You don't have the right to delete a subscription "
                             "already controlled or invalidated.")
         else:
@@ -922,14 +921,14 @@ class Cotisation(RevMixin, AclMixin, models.Model):
 
     def can_view(self, user_request, *_args, **_kwargs):
         if not user_request.has_perm('cotisations.view_cotisation') and\
-                self.vente.invoice.user != user_request:
+                self.purchase.invoice.user != user_request:
             return False, _("You don't have the right to view someone else's "
                             "subscription history.")
         else:
             return True, None
 
     def __str__(self):
-        return str(self.vente)
+        return str(self.purchase)
 
 
 @receiver(post_save, sender=Cotisation)