diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index efd78632c..a8bc357c0 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -33,6 +33,7 @@ Changelog
  * Fix: Specific page permission checks are now enforced when viewing a page revision (Andy Chosak)
  * Fix: `pageurl` and `slugurl` tags no longer fail when `request.site` is `None` (Samir Shah)
  * Fix: Output form media on add/edit image forms with custom models (Matt Westcott)
+ * Fix: Output form media on add/edit document forms with custom models (Sergey Fedoseev)
  * Fix: Layout for the clear checkbox in default FileField widget (Mikalai Radchuk)
  * Fix: Remove ASCII conversion from Postgres search backend, to support stemming in non-Latin alphabets (Pavel Denisov)
  * Fix: Prevent tab labels on page edit view from being cut off on very narrow screens (Kevin Howbrook)
diff --git a/docs/releases/2.7.rst b/docs/releases/2.7.rst
index 9bf80d3e6..61e536415 100644
--- a/docs/releases/2.7.rst
+++ b/docs/releases/2.7.rst
@@ -57,6 +57,7 @@ Bug fixes
  * Specific page permission checks are now enforced when viewing a page revision (Andy Chosak)
  * ``pageurl`` and ``slugurl`` tags no longer fail when ``request.site`` is ``None`` (Samir Shah)
  * Output form media on add/edit image forms with custom models (Matt Westcott)
+ * Output form media on add/edit document forms with custom models (Sergey Fedoseev)
  * Fixes layout for the clear checkbox in default FileField widget (Mikalai Radchuk)
  * Remove ASCII conversion from Postgres search backend, to support stemming in non-Latin alphabets (Pavel Denisov)
  * Prevent tab labels on page edit view from being cut off on very narrow screens (Kevin Howbrook)
diff --git a/wagtail/documents/templates/wagtaildocs/chooser/chooser.html b/wagtail/documents/templates/wagtaildocs/chooser/chooser.html
index 1b9d4c4d0..ce2d8bd53 100644
--- a/wagtail/documents/templates/wagtaildocs/chooser/chooser.html
+++ b/wagtail/documents/templates/wagtaildocs/chooser/chooser.html
@@ -2,6 +2,8 @@
 {% trans "Choose a document" as  choose_str %}
 {% include "wagtailadmin/shared/header.html" with title=choose_str tabbed=1 merged=1 icon="doc-full-inverse" %}
 
+{{ uploadform.media.js }}
+{{ uploadform.media.css }}
 
 {% if uploadform %}
     <ul class="tab-nav merged">
diff --git a/wagtail/documents/templates/wagtaildocs/documents/add.html b/wagtail/documents/templates/wagtaildocs/documents/add.html
index 4e5e37ceb..db38922c7 100644
--- a/wagtail/documents/templates/wagtaildocs/documents/add.html
+++ b/wagtail/documents/templates/wagtaildocs/documents/add.html
@@ -6,6 +6,8 @@
 {% block extra_js %}
     {{ block.super }}
 
+    {{ form.media.js }}
+
     {% url 'wagtailadmin_tag_autocomplete' as autocomplete_url %}
     <script>
         $(function() {
@@ -16,6 +18,11 @@
     </script>
 {% endblock %}
 
+{% block extra_css %}
+    {{ block.super }}
+    {{ form.media.css }}
+{% endblock %}
+
 {% block content %}
     {% trans "Add document" as add_str %}
     {% include "wagtailadmin/shared/header.html" with title=add_str icon="doc-full-inverse" %}
diff --git a/wagtail/documents/templates/wagtaildocs/documents/edit.html b/wagtail/documents/templates/wagtaildocs/documents/edit.html
index b81c23117..d1a755c69 100644
--- a/wagtail/documents/templates/wagtaildocs/documents/edit.html
+++ b/wagtail/documents/templates/wagtaildocs/documents/edit.html
@@ -6,6 +6,8 @@
 {% block extra_js %}
     {{ block.super }}
 
+    {{ form.media.js }}
+
     {% url 'wagtailadmin_tag_autocomplete' as autocomplete_url %}
     <script>
         $(function() {
@@ -16,6 +18,11 @@
     </script>
 {% endblock %}
 
+{% block extra_css %}
+    {{ block.super }}
+    {{ form.media.css }}
+{% endblock %}
+
 {% block content %}
     {% trans "Editing" as editing_str %}
     {% include "wagtailadmin/shared/header.html" with title=editing_str subtitle=document.title icon="doc-full-inverse" %}
diff --git a/wagtail/documents/templates/wagtaildocs/multiple/add.html b/wagtail/documents/templates/wagtaildocs/multiple/add.html
index 48dda205a..5d60a1a01 100644
--- a/wagtail/documents/templates/wagtaildocs/multiple/add.html
+++ b/wagtail/documents/templates/wagtaildocs/multiple/add.html
@@ -6,6 +6,8 @@
 {% block extra_css %}
     {{ block.super }}
 
+    {{ form_media.css }}
+
     <link rel="stylesheet" href="{% static 'wagtaildocs/css/add-multiple.css' %}" type="text/css" />
 {% endblock %}
 
@@ -67,6 +69,8 @@
 {% block extra_js %}
     {{ block.super }}
 
+    {{ form_media.js }}
+
     <!-- this exact order of plugins is vital -->
     <script src="{% static 'wagtailadmin/js/vendor/jquery.iframe-transport.js' %}"></script>
     <script src="{% static 'wagtailadmin/js/vendor/jquery.fileupload.js' %}"></script>
diff --git a/wagtail/documents/tests/test_admin_views.py b/wagtail/documents/tests/test_admin_views.py
index a679eb098..d4496cae5 100644
--- a/wagtail/documents/tests/test_admin_views.py
+++ b/wagtail/documents/tests/test_admin_views.py
@@ -11,7 +11,7 @@ from django.urls import reverse
 from wagtail.core.models import Collection, GroupCollectionPermission, Page
 from wagtail.documents import models
 from wagtail.documents.tests.utils import get_test_document_file
-from wagtail.tests.testapp.models import EventPage, EventPageRelatedLink
+from wagtail.tests.testapp.models import CustomDocument, EventPage, EventPageRelatedLink
 from wagtail.tests.utils import WagtailTestUtils
 
 
@@ -115,6 +115,9 @@ class TestDocumentAddView(TestCase, WagtailTestUtils):
         # Ensure the form supports file uploads
         self.assertContains(response, 'enctype="multipart/form-data"')
 
+        # draftail should NOT be a standard JS include on this page
+        self.assertNotContains(response, 'wagtailadmin/js/draftail.js')
+
     def test_get_with_collections(self):
         root_collection = Collection.get_first_root_node()
         root_collection.add_child(name="Evil plans")
@@ -126,6 +129,21 @@ class TestDocumentAddView(TestCase, WagtailTestUtils):
         self.assertContains(response, '<label for="id_collection">')
         self.assertContains(response, "Evil plans")
 
+    @override_settings(WAGTAILDOCS_DOCUMENT_MODEL='tests.CustomDocument')
+    def test_get_with_custom_document_model(self):
+        response = self.client.get(reverse('wagtaildocs:add'))
+        self.assertEqual(response.status_code, 200)
+        self.assertTemplateUsed(response, 'wagtaildocs/documents/add.html')
+
+        # Ensure the form supports file uploads
+        self.assertContains(response, 'enctype="multipart/form-data"')
+
+        # custom fields should be included
+        self.assertContains(response, 'name="fancy_description"')
+
+        # form media should be imported
+        self.assertContains(response, 'wagtailadmin/js/draftail.js')
+
     def test_post(self):
         # Build a fake file
         fake_file = get_test_document_file()
@@ -259,6 +277,11 @@ class TestDocumentEditView(TestCase, WagtailTestUtils):
         # Ensure the form supports file uploads
         self.assertContains(response, 'enctype="multipart/form-data"')
 
+        # draftail should NOT be a standard JS include on this page
+        # (see TestDocumentEditViewWithCustomDocumentModel - this confirms that form media
+        # definitions are being respected)
+        self.assertNotContains(response, 'wagtailadmin/js/draftail.js')
+
     def test_post(self):
         # Build a fake file
         fake_file = get_test_document_file()
@@ -339,6 +362,34 @@ class TestDocumentEditView(TestCase, WagtailTestUtils):
                          b'An updated test content.')
 
 
+@override_settings(WAGTAILDOCS_DOCUMENT_MODEL='tests.CustomDocument')
+class TestDocumentEditViewWithCustomDocumentModel(TestCase, WagtailTestUtils):
+    def setUp(self):
+        self.login()
+
+        # Create a document to edit
+        self.document = CustomDocument.objects.create(
+            title="Test document",
+            file=get_test_document_file(),
+        )
+
+        self.storage = self.document.file.storage
+
+    def get(self, params={}):
+        return self.client.get(reverse('wagtaildocs:edit', args=(self.document.id,)), params)
+
+    def test_get_with_custom_document_model(self):
+        response = self.get()
+        self.assertEqual(response.status_code, 200)
+        self.assertTemplateUsed(response, 'wagtaildocs/documents/edit.html')
+
+        # Ensure the form supports file uploads
+        self.assertContains(response, 'enctype="multipart/form-data"')
+
+        # form media should be imported
+        self.assertContains(response, 'wagtailadmin/js/draftail.js')
+
+
 class TestDocumentDeleteView(TestCase, WagtailTestUtils):
     def setUp(self):
         self.login()
@@ -393,6 +444,10 @@ class TestMultipleDocumentUploader(TestCase, WagtailTestUtils):
         self.assertEqual(self.doc.title, "New title!")
         self.assertFalse(self.doc.tags.all())
 
+    def check_form_media_in_response(self, response):
+        # draftail should NOT be a standard JS include on this page
+        self.assertNotContains(response, 'wagtailadmin/js/draftail.js')
+
     def test_add(self):
         """
         This tests that the add view responds correctly on a GET request
@@ -407,6 +462,8 @@ class TestMultipleDocumentUploader(TestCase, WagtailTestUtils):
         # no collection chooser when only one collection exists
         self.assertNotContains(response, '<label for="id_adddocument_collection">')
 
+        self.check_form_media_in_response(response)
+
     def test_add_with_collections(self):
         root_collection = Collection.get_first_root_node()
         root_collection.add_child(name="Evil plans")
@@ -657,6 +714,10 @@ class TestMultipleCustomDocumentUploader(TestMultipleDocumentUploader):
         super().check_doc_after_edit()
         self.assertEqual(self.doc.description, "New description.")
 
+    def check_form_media_in_response(self, response):
+        # form media should be imported
+        self.assertContains(response, 'wagtailadmin/js/draftail.js')
+
 
 class TestMultipleCustomDocumentUploaderNoCollection(TestMultipleCustomDocumentUploader):
     @classmethod
@@ -684,6 +745,23 @@ class TestDocumentChooserView(TestCase, WagtailTestUtils):
         response_json = json.loads(response.content.decode())
         self.assertEqual(response_json['step'], 'chooser')
 
+        # draftail should NOT be a standard JS include on this page
+        self.assertNotIn('wagtailadmin/js/draftail.js', response_json['html'])
+
+    @override_settings(WAGTAILDOCS_DOCUMENT_MODEL='tests.CustomDocument')
+    def test_with_custom_document_model(self):
+        response = self.client.get(reverse('wagtaildocs:chooser'))
+        self.assertEqual(response.status_code, 200)
+        response_json = json.loads(response.content.decode())
+        self.assertEqual(response_json['step'], 'chooser')
+        self.assertTemplateUsed(response, 'wagtaildocs/chooser/chooser.html')
+
+        # custom form fields should be present
+        self.assertIn('name="document-chooser-upload-fancy_description"', response_json['html'])
+
+        # form media imports should appear on the page
+        self.assertIn('wagtailadmin/js/draftail.js', response_json['html'])
+
     def test_search(self):
         response = self.client.get(reverse('wagtaildocs:chooser'), {'q': "Hello"})
         self.assertEqual(response.status_code, 200)
diff --git a/wagtail/documents/views/multiple.py b/wagtail/documents/views/multiple.py
index 29c747bbd..bff71d090 100644
--- a/wagtail/documents/views/multiple.py
+++ b/wagtail/documents/views/multiple.py
@@ -79,12 +79,15 @@ def add(request):
                 'error_message': '\n'.join(['\n'.join([force_str(i) for i in v]) for k, v in form.errors.items()]),
             })
     else:
+        # Instantiate a dummy copy of the form that we can retrieve validation messages and media from;
+        # actual rendering of forms will happen on AJAX POST rather than here
         form = DocumentForm(user=request.user)
 
-    return render(request, 'wagtaildocs/multiple/add.html', {
-        'help_text': form.fields['file'].help_text,
-        'collections': collections_to_choose,
-    })
+        return render(request, 'wagtaildocs/multiple/add.html', {
+            'help_text': form.fields['file'].help_text,
+            'collections': collections_to_choose,
+            'form_media': form.media,
+        })
 
 
 @require_POST
diff --git a/wagtail/tests/testapp/migrations/0043_customdocument_fancy_description.py b/wagtail/tests/testapp/migrations/0043_customdocument_fancy_description.py
new file mode 100644
index 000000000..b2ba6c5d3
--- /dev/null
+++ b/wagtail/tests/testapp/migrations/0043_customdocument_fancy_description.py
@@ -0,0 +1,19 @@
+# Generated by Django 2.2.5 on 2019-09-27 14:45
+
+from django.db import migrations
+import wagtail.core.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('tests', '0042_simplechildpage_simpleparentpage'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='customdocument',
+            name='fancy_description',
+            field=wagtail.core.fields.RichTextField(blank=True),
+        ),
+    ]
diff --git a/wagtail/tests/testapp/models.py b/wagtail/tests/testapp/models.py
index 77b59cf72..cf2330066 100644
--- a/wagtail/tests/testapp/models.py
+++ b/wagtail/tests/testapp/models.py
@@ -920,8 +920,10 @@ class CustomRendition(AbstractRendition):
 
 class CustomDocument(AbstractDocument):
     description = models.TextField(blank=True)
+    fancy_description = RichTextField(blank=True)
     admin_form_fields = Document.admin_form_fields + (
         'description',
+        'fancy_description'
     )