diff --git a/addons/web/controllers/main.py b/addons/web/controllers/main.py
index 83b59fc60a1..47f487d1142 100644
--- a/addons/web/controllers/main.py
+++ b/addons/web/controllers/main.py
@@ -491,14 +491,27 @@ class HomeStaticTemplateHelpers(object):
             if re.match(COMMENT_PATTERN, comment.text.strip()):
                 comment.getparent().remove(comment)
 
-    def _read_addon_file(self, file_path):
-        """Reads the content of a file given by file_path
-        Usefull to make 'self' testable
-        :param str file_path:
-        :returns: str
+    def _read_addon_file(self, path_or_url):
+        """Read the content of a file or an ``ir.attachment`` record given by
+        ``path_or_url``.
+
+        :param str path_or_url:
+        :returns: bytes
+        :raises FileNotFoundError: if the path does not match a module file
+            or an attachment
         """
-        with file_open(file_path, 'rb') as fp:
-            contents = fp.read()
+        try:
+            with file_open(path_or_url, 'rb') as fp:
+                contents = fp.read()
+        except FileNotFoundError as e:
+            attachment = request.env['ir.attachment'].sudo().search([
+                ('url', '=', path_or_url),
+                ('type', '=', 'binary'),
+            ], limit=1)
+            if attachment:
+                contents = attachment.raw
+            else:
+                raise e
         return contents
 
     def _concat_xml(self, file_dict):
diff --git a/addons/web/tests/test_serving_base.py b/addons/web/tests/test_serving_base.py
index 79fb256667b..05cb8630766 100644
--- a/addons/web/tests/test_serving_base.py
+++ b/addons/web/tests/test_serving_base.py
@@ -9,7 +9,7 @@ from datetime import datetime, timedelta
 from lxml import etree
 import logging
 
-from odoo.tests.common import BaseCase, tagged
+from odoo.tests.common import BaseCase, HttpCase, tagged
 from odoo.tools import topological_sort
 from odoo.addons.web.controllers.main import HomeStaticTemplateHelpers
 
@@ -900,6 +900,35 @@ class TestStaticInheritance(TestStaticInheritanceCommon):
 
         self.assertXMLEqual(contents, expected)
 
+@tagged('static_templates')
+class TestHttpStaticInheritance(HttpCase):
+    def test_static_attachments(self):
+        url = '/test_module/test_file.xml'
+        self.env['ir.attachment'].create({
+            'name': 'test_attachment',
+            'url': url,
+            'res_model': 'ir.ui.view',
+            'type': 'binary',
+            'raw': b"""
+                <templates>
+                    <t t-name="test_template">
+                        <div class="test_div" />
+                    </t>
+                </templates>
+            """
+        })
+        self.env['ir.asset'].create({
+            'name': 'test_asset',
+            'path': url,
+            'bundle': 'test.bundle',
+        })
+
+
+        res = self.url_open('/web/webclient/qweb/HASH_BIDON?bundle=test.bundle')
+        [template] = etree.fromstring(res.text)
+
+        self.assertEqual(template.get('t-name'), 'test_template')
+        self.assertEqual(template[0].get('class'), 'test_div')
 
 @tagged('-standard', 'static_templates_performance')
 class TestStaticInheritancePerformance(TestStaticInheritanceCommon):