diff --git a/kfet/views.py b/kfet/views.py
index 707e2ddb..a5d330fb 100644
--- a/kfet/views.py
+++ b/kfet/views.py
@@ -449,7 +449,7 @@ def kpsul_perform_operations(request):
         operationgroup.amount += operation.amount
         # 4
         if operation.type == Operation.DEPOSIT:
-            required_perms.append('kfet.can_perform_deposit')
+            required_perms.append('kfet.perform_deposit')
 
     # Starting transaction to ensure data consistency
     # Using select_for_update where it is critical
@@ -478,7 +478,7 @@ def kpsul_perform_operations(request):
             on_acc.save()
             # Saving addcost_for with new balance if there is one
             if is_addcost:
-                addcost_for += addcost_total
+                addcost_for.balance += addcost_total
                 addcost_for.save()
 
             # Saving operation group