diff --git a/wagtail/wagtailusers/forms.py b/wagtail/wagtailusers/forms.py
index 3c7c3acb5..3fc1b3096 100644
--- a/wagtail/wagtailusers/forms.py
+++ b/wagtail/wagtailusers/forms.py
@@ -3,6 +3,7 @@ from django.contrib.auth.forms import UserCreationForm as BaseUserCreationForm
 from django.utils.translation import ugettext_lazy as _
 from django.contrib.auth import get_user_model
 from django.contrib.auth.models import Group, Permission
+from django.forms.models import inlineformset_factory
 
 from wagtail.wagtailcore import hooks
 from wagtail.wagtailadmin.widgets import AdminPageChooser
@@ -213,6 +214,15 @@ class BaseGroupPagePermissionFormSet(forms.models.BaseInlineFormSet):
         return empty_form
 
 
+GroupPagePermissionFormSet = inlineformset_factory(
+    Group,
+    GroupPagePermission,
+    formset=BaseGroupPagePermissionFormSet,
+    extra=0,
+    fields=('page', 'permission_type'),
+)
+
+
 class NotificationPreferencesForm(forms.ModelForm):
     def __init__(self, *args, **kwargs):
         super(NotificationPreferencesForm, self).__init__(*args, **kwargs)
diff --git a/wagtail/wagtailusers/views/groups.py b/wagtail/wagtailusers/views/groups.py
index 21eb08c76..6c8654216 100644
--- a/wagtail/wagtailusers/views/groups.py
+++ b/wagtail/wagtailusers/views/groups.py
@@ -5,12 +5,10 @@ from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
 from django.core.urlresolvers import reverse
 from django.utils.translation import ugettext as _
 from django.views.decorators.vary import vary_on_headers
-from django.forms.models import inlineformset_factory
 
 from wagtail.wagtailadmin import messages
 from wagtail.wagtailadmin.forms import SearchForm
-from wagtail.wagtailusers.forms import GroupForm, BaseGroupPagePermissionFormSet
-from wagtail.wagtailcore.models import GroupPagePermission
+from wagtail.wagtailusers.forms import GroupForm, GroupPagePermissionFormSet
 
 
 def user_has_group_model_perm(user):
@@ -79,12 +77,6 @@ def index(request):
 
 @permission_required('auth.add_group')
 def create(request):
-    GroupPagePermissionFormSet = inlineformset_factory(
-        Group,
-        GroupPagePermission,
-        formset=BaseGroupPagePermissionFormSet,
-        extra=0
-    )
     if request.POST:
         form = GroupForm(request.POST)
         formset = GroupPagePermissionFormSet(request.POST)
@@ -111,12 +103,6 @@ def create(request):
 @permission_required('auth.change_group')
 def edit(request, group_id):
     group = get_object_or_404(Group, id=group_id)
-    GroupPagePermissionFormSet = inlineformset_factory(
-        Group,
-        GroupPagePermission,
-        formset=BaseGroupPagePermissionFormSet,
-        extra=0
-    )
     if request.POST:
         form = GroupForm(request.POST, instance=group)
         formset = GroupPagePermissionFormSet(request.POST, instance=group)