diff --git a/coreapi/linphonecall.c b/coreapi/linphonecall.c
index 64aa3d655..90be48b28 100644
--- a/coreapi/linphonecall.c
+++ b/coreapi/linphonecall.c
@@ -555,7 +555,7 @@ static void transfer_already_assigned_payload_types(SalMediaDescription *old, Sa
 }
 
 static const char *linphone_call_get_bind_ip_for_stream(LinphoneCall *call, int stream_index){
-	const char *bind_ip=call->af==AF_INET6 ? "::0" : "0.0.0.0";
+	const char *bind_ip = lp_config_get_string(call->core->config,"rtp","bind_address",call->af==AF_INET6 ? "::0" : "0.0.0.0"); ;
 
 	if (stream_index<2 && call->media_ports[stream_index].multicast_ip[0]!='\0'){
 		if (call->dir==LinphoneCallOutgoing){
@@ -611,7 +611,8 @@ void linphone_call_make_local_media_description(LinphoneCore *lc, LinphoneCall *
 	md->nb_streams=(call->biggestdesc ? call->biggestdesc->nb_streams : 1);
 
 	strncpy(md->addr,call->localip,sizeof(md->addr));
-	strncpy(md->username,linphone_address_get_username(addr),sizeof(md->username));
+	if (linphone_address_get_username(addr)) /*might be null in case of identity without userinfo*/
+		strncpy(md->username,linphone_address_get_username(addr),sizeof(md->username));
 	if (subject) strncpy(md->name,subject,sizeof(md->name));
 
 	if (call->params->down_bw)
diff --git a/coreapi/linphonecore.c b/coreapi/linphonecore.c
index f8ca71bd2..82eb5f742 100644
--- a/coreapi/linphonecore.c
+++ b/coreapi/linphonecore.c
@@ -2239,7 +2239,7 @@ int _linphone_core_apply_transports(LinphoneCore *lc){
 	Sal *sal=lc->sal;
 	const char *anyaddr;
 	LCSipTransports *tr=&lc->sip_conf.transports;
-
+	const char* listening_address;
 	/*first of all invalidate all current registrations so that we can register again with new transports*/
 	__linphone_core_invalidate_registers(lc);
 
@@ -2249,24 +2249,27 @@ int _linphone_core_apply_transports(LinphoneCore *lc){
 		anyaddr="0.0.0.0";
 
 	sal_unlisten_ports(sal);
+
+	listening_address = lp_config_get_string(lc->config,"sip","bind_address",anyaddr);
+
 	if (lc->tunnel && linphone_tunnel_sip_enabled(lc->tunnel) && linphone_tunnel_get_activated(lc->tunnel)){
 		if (sal_listen_port(sal,anyaddr,tr->udp_port,SalTransportUDP,TRUE)!=0){
 			transport_error(lc,"udp+tunnel",tr->udp_port);
 		}
 	}else{
 		if (tr->udp_port!=0){
-			if (sal_listen_port(sal,anyaddr,tr->udp_port,SalTransportUDP,FALSE)!=0){
+			if (sal_listen_port(sal,listening_address,tr->udp_port,SalTransportUDP,FALSE)!=0){
 				transport_error(lc,"udp",tr->udp_port);
 			}
 		}
 		if (tr->tcp_port!=0){
-			if (sal_listen_port (sal,anyaddr,tr->tcp_port,SalTransportTCP,FALSE)!=0){
+			if (sal_listen_port (sal,listening_address,tr->tcp_port,SalTransportTCP,FALSE)!=0){
 				transport_error(lc,"tcp",tr->tcp_port);
 			}
 		}
 		if (linphone_core_sip_transport_supported(lc,LinphoneTransportTls)){
 			if (tr->tls_port!=0){
-				if (sal_listen_port (sal,anyaddr,tr->tls_port,SalTransportTLS,FALSE)!=0){
+				if (sal_listen_port (sal,listening_address,tr->tls_port,SalTransportTLS,FALSE)!=0){
 					transport_error(lc,"tls",tr->tls_port);
 				}
 			}
@@ -2327,7 +2330,7 @@ int linphone_core_set_sip_transports(LinphoneCore *lc, const LCSipTransports * t
 /**
  * Retrieves the port configuration used for each transport (udp, tcp, tls).
  * A zero value port for a given transport means the transport
- * is not used. A value of LC_SIP_TRANSPORT_RANDOM (-1) means the port is to be choosen randomly by the system.
+ * is not used. A value of LC_SIP_TRANSPORT_RANDOM (-1) means the port is to be chosen randomly by the system.
  * @ingroup network_parameters
 **/
 int linphone_core_get_sip_transports(LinphoneCore *lc, LCSipTransports *tr){
diff --git a/linphone.spec.in b/linphone.spec.in
index 6fc3f958b..f9e954945 100644
--- a/linphone.spec.in
+++ b/linphone.spec.in
@@ -38,7 +38,7 @@ over the internet. It has a gtk+ and console interface.
 Summary:       Development libraries for linphone
 Group:         Development/Libraries
 Requires:      %{name} = %{version}-%{release}
-Requires:      ortp-devel = @ORTP_VERSION@
+Requires:      ortp-devel = 1:@ORTP_VERSION@
 Requires:      mediastreamer-devel = @MS2_VERSION@
 Requires:      glib2-devel