diff --git a/vdirsyncer/storage/http.py b/vdirsyncer/storage/http.py
index cc2bdb6..5f05736 100644
--- a/vdirsyncer/storage/http.py
+++ b/vdirsyncer/storage/http.py
@@ -91,6 +91,7 @@ def split_collection(lines):
 
     return rv
 
+
 def prepare_auth(auth, username, password):
     if (username and password) or auth == 'basic':
         return (username, password)