diff --git a/vdirsyncer/storage/http.py b/vdirsyncer/storage/http.py
index 37330c9..b09676e 100644
--- a/vdirsyncer/storage/http.py
+++ b/vdirsyncer/storage/http.py
@@ -108,7 +108,8 @@ class HttpStorage(Storage):
         return {'User-Agent': self.useragent}
 
     def list(self):
-        r = request('GET', self.url, **self._settings)
+        r = request('GET', self.url, **self._settings,
+                    headers=self._default_headers())
         self._items = {}
 
         for item in split_collection(r.text):