diff --git a/lib/http-listener.js b/lib/http-listener.js
index ed217ea..57ead95 100644
--- a/lib/http-listener.js
+++ b/lib/http-listener.js
@@ -33,7 +33,7 @@ function mainHandler(req, res) {
     if (!req.body) req.body = {};
 
     if (
-        ( !req.body.partner || !req.query.partner )
+        ( !req.body.partner && !req.query.partner )
         &&
         (
             ( (!req.query.is_outgoing && !req.body.is_outgoing) && (!req.query.from && !req.body.from) )