diff --git a/pharo-porting/changes_for_pharo.st b/pharo-porting/changes_for_pharo.st
index 0247740..b7059fe 100644
--- a/pharo-porting/changes_for_pharo.st
+++ b/pharo-porting/changes_for_pharo.st
@@ -189,6 +189,19 @@ SIPDigest class extend [
     ]
 ]
 
+SIPUdpTransport extend [
+    initialize: anAddress port: aPort [
+        self flag: #todo. "Cant select which interface to bind to..."
+        socket := Socket newUDP
+                    setPort: aPort;
+                    yourself.
+        net := OsmoUDPSocket new
+            name: 'SIPTransport';
+            onData: [ :data | self handleData: data ];
+            yourself
+    ]
+]
+
 SIPUdpTransportTest extend [
     testSending [
 	| target transp datagram read |