diff --git a/phoneinterface.py b/phoneinterface.py
index c4473c0..f572db2 100644
--- a/phoneinterface.py
+++ b/phoneinterface.py
@@ -61,7 +61,10 @@ class PhoneInterface(object):
 
             pconf = self.__core.create_proxy_config()
             pconf.edit()
-            pconf.identity = p.identity
+            if self.__core.version < '3.9.0':
+                pconf.identity = p.identity
+            else:
+                pconf.identity_address = pconf.normalize_sip_uri(p.identity)
             pconf.publish_enabled = False
             pconf.realm = p.realm
             pconf.register_enabled = True