diff --git a/coreapi/proxy.c b/coreapi/proxy.c
index 65f2a3965..cafef59d0 100644
--- a/coreapi/proxy.c
+++ b/coreapi/proxy.c
@@ -277,18 +277,14 @@ LinphoneAddress *guess_contact_for_register(LinphoneProxyConfig *obj){
 
 		const char *localip = NULL;
 		char *tmp;
-		LinphoneAddress *contact=linphone_address_new(obj->reg_identity);
+
 
 		if (obj->contact_params)
-			tmp=ms_strdup_printf("<sip:%s@%s;%s>",linphone_address_get_username(contact)
-											,linphone_address_get_domain(contact)
-											,obj->contact_params);
+			tmp = ms_strdup_printf("%s;%s", obj->reg_identity, obj->contact_params);
 		else
-			tmp=ms_strdup_printf("<sip:%s@%s>",linphone_address_get_username(contact)
-											,linphone_address_get_domain(contact));
+			tmp = strdup(obj->reg_identity);
 		
-		linphone_address_destroy(contact);
-		contact=linphone_address_new(tmp);
+		LinphoneAddress *contact = linphone_address_new(tmp);
 		if (!contact) {
 			ms_error("No valid contact_params for [%s]",linphone_address_get_domain(proxy));
 			return NULL;