diff --git a/billard/views.py b/billard/views.py
index 0d4a040..c78c742 100644
--- a/billard/views.py
+++ b/billard/views.py
@@ -98,7 +98,7 @@ def accounting(request):
         if 'accountings' in request.POST:
             acc_ids = request.POST['accountings'].split(',')
             Accounting.objects.filter(id__in=acc_ids).update(billed=True)
-            Accounting.objects.filter(id__in=acc_ids).update(account_user=request.user)
+            Accounting.objects.filter(id__in=acc_ids).update(account_user=request.user.username)
         request.session['loc'] = str(loc)
         resp = redirect('accounting')
         resp['Location'] += '?loc={}'.format(str(loc))