diff --git a/pym/calculate/lib/utils/binhosts.py b/pym/calculate/lib/utils/binhosts.py
index aa6d44c..814a0e7 100644
--- a/pym/calculate/lib/utils/binhosts.py
+++ b/pym/calculate/lib/utils/binhosts.py
@@ -45,6 +45,7 @@ def _urlopen(fn, timeout=None):
     """
     proxy_handler = urllib2.ProxyHandler({})
     opener = urllib2.build_opener(proxy_handler)
+    opener.addheaders = [('User-Agent', 'Calculate Linux')]
     if timeout is not None:
         f = opener.open(fn, timeout=timeout)
     else: