diff --git a/kfet/views.py b/kfet/views.py
index 4c5ad69f..842e372a 100644
--- a/kfet/views.py
+++ b/kfet/views.py
@@ -542,11 +542,7 @@ def kpsul_perform_operations(request):
                 data['operations'].append(operation.pk)
     except PermissionDenied:
         # Sending BAD_REQUEST with missing perms or url to manage negative
-        missing_perms = \
-            [ Permission.objects.get(codename=codename).name for codename in (
-                (perm.split('.'))[1] for perm in
-                required_perms if not request.user.has_perm(perm)
-            )]
+        missing_perms = get_missing_perms(required_perms, request.user)
         if missing_perms:
             data['errors'].append({'missing_perms': missing_perms })
         if stop_ope:
@@ -566,7 +562,10 @@ def kpsul_cancel_operations(request):
         opes_post = set(map(int, filter(None, request.POST.getlist('operation', []))))
     except ValueError:
         return JsonResponse(data, status=400)
-    opes_all = Operation.objects.select_related('group', 'group__on_acc', 'group__on_acc__negative').filter(pk__in=opes_post)
+    opes_all = (
+        Operation.objects
+        .select_related('group', 'group__on_acc', 'group__on_acc__negative')
+        .filter(pk__in=opes_post))
     opes_pk  = [ ope.pk for ope in opes_all ]
     opes_notexisting = [ ope for ope in opes_post if ope not in opes_pk ]
     if opes_notexisting: