diff --git a/kamailio/sanity.cfg b/kamailio/sanity.cfg
index 894c35e..8db6d89 100644
--- a/kamailio/sanity.cfg
+++ b/kamailio/sanity.cfg
@@ -60,6 +60,7 @@ route[SANITY_CHECK]
         $ua == "pplsip" ||
         $ua =~ "NiceGuy" ||
         $ua =~ "PortSIP" ||
+        $ua =~ "QNQ" ||
         $ua =~ "sipcli" ) {
         xlog("L_WARN", "$ci|end|dropping message with user-agent $ua from $si:$sp\n");
         drop;