diff --git a/wagtail/contrib/modeladmin/options.py b/wagtail/contrib/modeladmin/options.py
index 66392277d1..52c6229046 100644
--- a/wagtail/contrib/modeladmin/options.py
+++ b/wagtail/contrib/modeladmin/options.py
@@ -4,7 +4,7 @@ from django.conf.urls import url
 from django.contrib.auth.models import Permission
 from django.core.exceptions import ImproperlyConfigured
 from django.db.models import Model
-from django.forms.widgets import flatatt
+from django.forms.utils import flatatt
 from django.utils.safestring import mark_safe
 from django.utils.translation import ugettext_lazy as _
 
diff --git a/wagtail/wagtailimages/models.py b/wagtail/wagtailimages/models.py
index 3ae20314b8..5d720a85d5 100644
--- a/wagtail/wagtailimages/models.py
+++ b/wagtail/wagtailimages/models.py
@@ -11,7 +11,7 @@ from django.core import checks
 from django.core.files import File
 from django.core.urlresolvers import reverse
 from django.db import models
-from django.forms.widgets import flatatt
+from django.forms.utils import flatatt
 from django.utils.encoding import python_2_unicode_compatible
 from django.utils.functional import cached_property
 from django.utils.safestring import mark_safe