diff --git a/rhodecode/lib/middleware/pygrack.py b/rhodecode/lib/middleware/pygrack.py
--- a/rhodecode/lib/middleware/pygrack.py
+++ b/rhodecode/lib/middleware/pygrack.py
@@ -150,6 +150,7 @@ class GitRepository(object):
 
         resp = Response()
         resp.content_type = 'application/x-%s-result' % git_command.encode('utf8')
+        resp.charset = None
         resp.app_iter = out
         return resp