diff --git a/examples/sip_client/sip_client.cpp b/examples/sip_client/sip_client.cpp
index 916bfce6f2..cb6affd168 100644
--- a/examples/sip_client/sip_client.cpp
+++ b/examples/sip_client/sip_client.cpp
@@ -29,7 +29,7 @@ void on_open(websocketpp::connection_hdl hdl) {
     
     received=false;
     // Send a SIP OPTIONS message to the server:
-    std::string SIP_msg="OPTIONS sip:carol@chicago.com SIP/2.0\r\nVia: SIP/2.0/UDP pc33.atlanta.com;branch=z9hG4bKhjhs8ass877\r\nMax-Forwards: 70\r\nTo: <sip:carol@chicago.com>\r\nFrom: Alice <sip:alice@atlanta.com>;tag=1928301774\r\nCall-ID: a84b4c76e66710\r\nCSeq: 63104 OPTIONS\r\nContact: <sip:alice@pc33.atlanta.com>\r\nAccept: application/sdp\r\nContent-Length: 0\r\n\r\n";
+    std::string SIP_msg="OPTIONS sip:carol@chicago.com SIP/2.0\r\nVia: SIP/2.0/WS df7jal23ls0d.invalid;rport;branch=z9hG4bKhjhs8ass877\r\nMax-Forwards: 70\r\nTo: <sip:carol@chicago.com>\r\nFrom: Alice <sip:alice@atlanta.com>;tag=1928301774\r\nCall-ID: a84b4c76e66710\r\nCSeq: 63104 OPTIONS\r\nContact: <sip:alice@pc33.atlanta.com>\r\nAccept: application/sdp\r\nContent-Length: 0\r\n\r\n";
     sip_client.send(hdl, SIP_msg.c_str(), websocketpp::frame::opcode::text);
 }