diff --git a/disqusapi/__init__.py b/disqusapi/__init__.py
index b592132..6c5b62b 100644
--- a/disqusapi/__init__.py
+++ b/disqusapi/__init__.py
@@ -184,6 +184,7 @@ def _request(self, endpoint=None, **kwargs):
             data = ''
         else:
             data = urllib.urlencode(params)
+            headers['Content-Type'] = 'application/x-www-form-urlencoded'
 
         conn = httplib.HTTPSConnection(HOST, timeout=api.timeout)
         conn.request(method, path, data, headers)