diff --git a/core/AmSession.cpp b/core/AmSession.cpp
index 200794e7..82eb93cb 100644
--- a/core/AmSession.cpp
+++ b/core/AmSession.cpp
@@ -676,12 +676,16 @@ void AmSession::sendUpdate()
   dlg.update("");
 }
 
-void AmSession::sendReinvite() 
-{
-  rtp_str.setLocalIP(AmConfig::LocalIP);
-  string sdp_body;
-  sdp.genResponse(AmConfig::LocalIP,rtp_str.getLocalPort(),sdp_body);
-  dlg.reinvite("", "application/sdp", sdp_body);
+void AmSession::sendReinvite(bool updateSDP) 
+{
+  if (updateSDP) {
+    rtp_str.setLocalIP(AmConfig::LocalIP);
+    string sdp_body;
+    sdp.genResponse(AmConfig::LocalIP,rtp_str.getLocalPort(),sdp_body);
+    dlg.reinvite("", "application/sdp", sdp_body);
+  } else {
+    dlg.reinvite("", "", "");
+  }
 }
 
 void AmSession::sendInvite() 
diff --git a/core/AmSession.h b/core/AmSession.h
index 0e1e764a..4a9236f1 100644
--- a/core/AmSession.h
+++ b/core/AmSession.h
@@ -264,7 +264,7 @@ public:
   /** send an UPDATE in the session */
   void sendUpdate();
   /** send a Re-INVITE (if connected) */
-  void sendReinvite();
+  void sendReinvite(bool updateSDP = true);
   /** send an INVITE */
   void sendInvite();
 
diff --git a/core/AmSipDialog.cpp b/core/AmSipDialog.cpp
index 80451da3..aa9142fe 100644
--- a/core/AmSipDialog.cpp
+++ b/core/AmSipDialog.cpp
@@ -583,9 +583,9 @@ int AmSipDialog::sendRequest(const string& method,
   if((method!="BYE")&&(method!="CANCEL"))
     msg += getContactHdr();
     
-  if(!hdrs.empty()){
-    msg += hdrs;
-    if(hdrs[hdrs.length()-1] != '\n')
+  if(!m_hdrs.empty()){
+    msg += m_hdrs;
+    if(m_hdrs[m_hdrs.length()-1] != '\n')
       msg += "\n";
   }
 
diff --git a/core/plug-in/session_timer/SessionTimer.cpp b/core/plug-in/session_timer/SessionTimer.cpp
index 53fd7349..b037f491 100644
--- a/core/plug-in/session_timer/SessionTimer.cpp
+++ b/core/plug-in/session_timer/SessionTimer.cpp
@@ -311,8 +311,9 @@ void SessionTimer::onTimeoutEvent(AmTimeoutEvent* timeout_ev)
   int timer_id = timeout_ev->data.get(0).asInt();
 
   if (timer_id == ID_SESSION_REFRESH_TIMER) {
-    if (session_refresher == refresh_local)
-      s->sendReinvite();
+    if (session_refresher == refresh_local) 
+      // send reinvite with SDP
+      s->sendReinvite(true);
     else
       WARN("need session refresh but remote session is refresher\n");
   } else if (timer_id == ID_SESSION_INTERVAL_TIMER) {