diff --git a/lib/RTCSession.js b/lib/RTCSession.js
index e1f2f819b..77060339d 100644
--- a/lib/RTCSession.js
+++ b/lib/RTCSession.js
@@ -1225,7 +1225,10 @@ RTCSession.prototype.receiveRequest = function(request) {
 
         if (this.late_sdp) {
           if (!request.body) {
-            ended.call(this, 'remote', request, JsSIP_C.causes.MISSING_SDP);
+            this.terminate({
+              cause: JsSIP_C.causes.MISSING_SDP,
+              status_code: 400
+            });
             break;
           }
 
@@ -1239,7 +1242,10 @@ RTCSession.prototype.receiveRequest = function(request) {
             },
             // failure
             function() {
-              ended.call(self, 'remote', request, JsSIP_C.causes.BAD_MEDIA_DESCRIPTION);
+              self.terminate({
+                cause: JsSIP_C.causes.BAD_MEDIA_DESCRIPTION,
+                status_code: 488
+              });
             }
           );
         }