diff --git a/homeassistant/components/http/cors.py b/homeassistant/components/http/cors.py
index 1ef70b5e022..419b62be2c6 100644
--- a/homeassistant/components/http/cors.py
+++ b/homeassistant/components/http/cors.py
@@ -1,4 +1,5 @@
 """Provide CORS support for the HTTP component."""
+from aiohttp.web_urldispatcher import Resource, ResourceRoute
 from aiohttp.hdrs import ACCEPT, CONTENT_TYPE, ORIGIN, AUTHORIZATION
 
 from homeassistant.const import (
@@ -8,6 +9,7 @@ from homeassistant.core import callback
 ALLOWED_CORS_HEADERS = [
     ORIGIN, ACCEPT, HTTP_HEADER_X_REQUESTED_WITH, CONTENT_TYPE,
     HTTP_HEADER_HA_AUTH, AUTHORIZATION]
+VALID_CORS_TYPES = (Resource, ResourceRoute)
 
 
 @callback
@@ -31,6 +33,9 @@ def setup_cors(app, origins):
         else:
             path = route
 
+        if not isinstance(path, VALID_CORS_TYPES):
+            return
+
         path = path.canonical
 
         if path in cors_added:
diff --git a/tests/components/http/test_cors.py b/tests/components/http/test_cors.py
index e17fb105efe..d9fa6c11309 100644
--- a/tests/components/http/test_cors.py
+++ b/tests/components/http/test_cors.py
@@ -140,3 +140,15 @@ async def test_cors_middleware_with_cors_allowed_view(hass):
 
     hass.http.app._on_startup.freeze()
     await hass.http.app.startup()
+
+
+async def test_cors_works_with_frontend(hass, hass_client):
+    """Test CORS works with the frontend."""
+    assert await async_setup_component(hass, 'frontend', {
+        'http': {
+            'cors_allowed_origins': ['http://home-assistant.io']
+        }
+    })
+    client = await hass_client()
+    resp = await client.get('/')
+    assert resp.status == 200