diff --git a/kfet/views.py b/kfet/views.py
index 0f25e647..ca6cab8d 100644
--- a/kfet/views.py
+++ b/kfet/views.py
@@ -1472,15 +1472,13 @@ def history_json(request):
 
     # Construction de la requête (sur les opérations) pour le prefetch
     ope_queryset_prefetch = Operation.objects.select_related(
-            'canceled_by__trigramme', 'addcost_for__trigramme',
-            'article__name')
+            'canceled_by', 'addcost_for',
+            'article')
     ope_prefetch = Prefetch('opes',
                             queryset=ope_queryset_prefetch)
 
     transfer_queryset_prefetch = Transfer.objects.select_related(
-            'from_acc__trigramme', 'to_acc__trigramme',
-            'from_acc__id', 'to_acc__id',
-            'canceled_by__trigramme')
+            'from_acc', 'to_acc', 'canceled_by')
 
     if accounts:
         transfer_queryset_prefetch = transfer_queryset_prefetch.filter(