diff --git a/kfet/views.py b/kfet/views.py
index e403505a..0d9f9544 100644
--- a/kfet/views.py
+++ b/kfet/views.py
@@ -1098,17 +1098,17 @@ def kpsul_perform_operations(request):
         if operation.type == Operation.EDIT:
             required_perms.add("kfet.edit_balance_account")
             need_comment = True
-    if account.is_cof:
+    if on_acc.is_cof:
         to_addcost_for_balance = to_addcost_for_balance / cof_grant_divisor
 
-    (perms, stop) = account.perms_to_perform_operation(amount=operationgroup.amount)
+    (perms, stop) = on_acc.perms_to_perform_operation(amount=operationgroup.amount)
     required_perms |= perms
 
     if stop:
         data["errors"].append(
             {
                 "code": "negative",
-                "message": f"Le compte {account.trigramme} a un solde insuffisant.",
+                "message": f"Le compte {on_acc.trigramme} a un solde insuffisant.",
             }
         )