diff --git a/django_lostplaces/lostplaces/admin.py b/django_lostplaces/lostplaces/admin.py
index be58dd5..d56db16 100644
--- a/django_lostplaces/lostplaces/admin.py
+++ b/django_lostplaces/lostplaces/admin.py
@@ -15,8 +15,7 @@ from lostplaces.forms import ExplorerCreationForm, ExplorerChangeForm
 class VoucherAdmin(admin.ModelAdmin):
     fields = ['code', 'expires_when', 'created_when']
     readonly_fields = ['created_when']
-    list_display = ('__str__', 'code', 'created_when', 'expires_when')
-    # todo: is_valid (Wurstwasser)
+    list_display = ('__str__', 'code', 'created_when', 'expires_when', 'valid')
 
 class PhotoAlbumsAdmin(admin.ModelAdmin):
     list_display = ('label', 'place', 'url' )