Update HTTPResponse call when mounting apps

1 files changed, 1 insertions, 1 deletions

diff --git a/bottle.py b/bottle.py
index 6d6d027..baa935d 100644
--- a/bottle.py
+++ b/bottle.py
@@ -568,7 +568,7 @@ class Bottle(object):
                     return rs.body.append
                 body = app(request.environ, start_response)
                 body = itertools.chain(rs.body, body)
-                return HTTPResponse(body, rs.status_code, rs.headers)
+                return HTTPResponse(body, rs.status_code, **rs.headers)
             finally:
                 request.path_shift(-path_depth)