diff --git a/bda/admin.py b/bda/admin.py
index 604ac883..8644a264 100644
--- a/bda/admin.py
+++ b/bda/admin.py
@@ -144,8 +144,9 @@ class SpectacleAdmin(admin.ModelAdmin):
 
 class TirageAdmin(admin.ModelAdmin):
     model = Tirage
-    list_display = ("title", "ouverture", "fermeture", "active")
-    readonly_fields = ("token", )
+    list_display = ("title", "ouverture", "fermeture", "active",
+            "enable_do_tirage")
+    readonly_fields = ("tokens", )
     list_filter = ("active", )
     search_fields = ("title", )
 
diff --git a/bda/migrations/0004_add_tirage_switch.py b/bda/migrations/0004_add_tirage_switch.py
new file mode 100644
index 00000000..1f566b6d
--- /dev/null
+++ b/bda/migrations/0004_add_tirage_switch.py
@@ -0,0 +1,30 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+from django.utils import timezone
+
+def forwards_func(apps, schema_editor):
+    Tirage = apps.get_model("bda", "Tirage")
+    db_alias = schema_editor.connection.alias
+    for tirage in Tirage.objects.all():
+        tirage.tokens = "Before %s\n\"\"\"%s\"\"\"\n" % (
+                timezone.now().strftime("%y-%m-%d %H:%M:%S"), 
+                tirage.tokens)
+        tirage.save()
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('bda', '0003_update_tirage_and_spectacle'),
+    ]
+
+    operations = [
+        migrations.RenameField('tirage', 'token', 'tokens'),
+        migrations.AddField(
+            model_name='tirage',
+            name='enable_do_tirage',
+            field=models.BooleanField(default=False, verbose_name=b'Le tirage peut \xc3\xaatre lanc\xc3\xa9'),
+        ),
+        migrations.RunPython(forwards_func, migrations.RunPython.noop),
+    ]
diff --git a/bda/models.py b/bda/models.py
index 16ea4818..01429dc2 100644
--- a/bda/models.py
+++ b/bda/models.py
@@ -10,8 +10,10 @@ class Tirage(models.Model):
     title = models.CharField("Titre", max_length=300)
     ouverture = models.DateTimeField("Date et heure d'ouverture du tirage")
     fermeture = models.DateTimeField("Date et heure de fermerture du tirage")
-    token = models.TextField("Graine du tirage", blank=True)
+    tokens = models.TextField("Graine(s) du tirage", blank=True)
     active = models.BooleanField("Tirage actif", default=False)
+    enable_do_tirage = models.BooleanField("Le tirage peut être lancé",
+            default=False)
 
     def date_no_seconds(self):
         return self.fermeture.strftime('%d %b %Y %H:%M')