diff --git a/docs/topics/search/indexing.rst b/docs/topics/search/indexing.rst
index a24d1415b..49e2a2053 100644
--- a/docs/topics/search/indexing.rst
+++ b/docs/topics/search/indexing.rst
@@ -216,7 +216,7 @@ To do this, inherit from ``index.Indexed`` and add some ``search_fields`` to the
 
     from wagtail.wagtailsearch import index
 
-    class Book(models.Model, index.Indexed):
+    class Book(index.Indexed, models.Model):
         title = models.CharField(max_length=255)
         genre = models.CharField(max_length=255, choices=GENRE_CHOICES)
         author = models.ForeignKey(Author)
diff --git a/docs/topics/snippets.rst b/docs/topics/snippets.rst
index ee4c640eb..19165d9bc 100644
--- a/docs/topics/snippets.rst
+++ b/docs/topics/snippets.rst
@@ -191,7 +191,7 @@ If a snippet model inherits from ``wagtail.wagtailsearch.index.Indexed``, as des
   ...
 
   @register_snippet
-  class Advert(models.Model, index.Indexed):
+  class Advert(index.Indexed, models.Model):
       url = models.URLField(null=True, blank=True)
       text = models.CharField(max_length=255)
 
diff --git a/wagtail/tests/search/migrations/0001_initial.py b/wagtail/tests/search/migrations/0001_initial.py
index 7421604f2..a8d8b81d5 100644
--- a/wagtail/tests/search/migrations/0001_initial.py
+++ b/wagtail/tests/search/migrations/0001_initial.py
@@ -28,7 +28,7 @@ class Migration(migrations.Migration):
                 ('live', models.BooleanField(default=False)),
                 ('published_date', models.DateField(null=True)),
             ],
-            bases=(models.Model, wagtail.wagtailsearch.index.Indexed),
+            bases=(wagtail.wagtailsearch.index.Indexed, models.Model),
         ),
         migrations.CreateModel(
             name='SearchTestChild',
diff --git a/wagtail/tests/snippets/migrations/0002_searchablesnippet.py b/wagtail/tests/snippets/migrations/0002_searchablesnippet.py
index 5a3da3b76..563fb6b6e 100644
--- a/wagtail/tests/snippets/migrations/0002_searchablesnippet.py
+++ b/wagtail/tests/snippets/migrations/0002_searchablesnippet.py
@@ -19,6 +19,6 @@ class Migration(migrations.Migration):
                 ('id', models.AutoField(serialize=False, primary_key=True, auto_created=True, verbose_name='ID')),
                 ('text', models.CharField(max_length=255)),
             ],
-            bases=(models.Model, wagtail.wagtailsearch.index.Indexed),
+            bases=(wagtail.wagtailsearch.index.Indexed, models.Model),
         ),
     ]
diff --git a/wagtail/tests/snippets/models.py b/wagtail/tests/snippets/models.py
index 56d06be61..bacf67400 100644
--- a/wagtail/tests/snippets/models.py
+++ b/wagtail/tests/snippets/models.py
@@ -47,7 +47,7 @@ class RegisterDecorator(models.Model):
 # A snippet model that inherits from index.Indexed can be searched on
 
 @register_snippet
-class SearchableSnippet(models.Model, index.Indexed):
+class SearchableSnippet(index.Indexed, models.Model):
     text = models.CharField(max_length=255)
 
     search_fields = [
diff --git a/wagtail/wagtailcore/migrations/0001_initial.py b/wagtail/wagtailcore/migrations/0001_initial.py
index a6d5fd3c9..224c380f2 100644
--- a/wagtail/wagtailcore/migrations/0001_initial.py
+++ b/wagtail/wagtailcore/migrations/0001_initial.py
@@ -96,7 +96,7 @@ class Migration(migrations.Migration):
             options={
                 'abstract': False,
             },
-            bases=(models.Model, wagtail.wagtailsearch.index.Indexed),
+            bases=(wagtail.wagtailsearch.index.Indexed, models.Model),
         ),
         migrations.RunPython(
             set_page_path_collation, migrations.RunPython.noop
diff --git a/wagtail/wagtailcore/migrations/0001_squashed_0016_change_page_url_path_to_text_field.py b/wagtail/wagtailcore/migrations/0001_squashed_0016_change_page_url_path_to_text_field.py
index d3a73ad17..ae014e84f 100644
--- a/wagtail/wagtailcore/migrations/0001_squashed_0016_change_page_url_path_to_text_field.py
+++ b/wagtail/wagtailcore/migrations/0001_squashed_0016_change_page_url_path_to_text_field.py
@@ -240,7 +240,7 @@ class Migration(migrations.Migration):
             options={
                 'abstract': False,
             },
-            bases=(models.Model, wagtail.wagtailsearch.index.Indexed),
+            bases=(wagtail.wagtailsearch.index.Indexed, models.Model),
         ),
         migrations.RunPython(
             set_page_path_collation, migrations.RunPython.noop
diff --git a/wagtail/wagtailcore/models.py b/wagtail/wagtailcore/models.py
index dade18d8c..f35e93ac8 100644
--- a/wagtail/wagtailcore/models.py
+++ b/wagtail/wagtailcore/models.py
@@ -290,7 +290,7 @@ class PageBase(models.base.ModelBase):
 
 
 @python_2_unicode_compatible
-class Page(six.with_metaclass(PageBase, MP_Node, ClusterableModel, index.Indexed)):
+class Page(six.with_metaclass(PageBase, MP_Node, index.Indexed, ClusterableModel)):
     title = models.CharField(
         verbose_name=_('title'),
         max_length=255,