diff --git a/html5/verto/js/src/jquery.FSRTC.js b/html5/verto/js/src/jquery.FSRTC.js
index 661442f0b4..82b7c6fd8d 100644
--- a/html5/verto/js/src/jquery.FSRTC.js
+++ b/html5/verto/js/src/jquery.FSRTC.js
@@ -715,6 +715,7 @@
         }
 
 	config.bundlePolicy = "max-compat";
+	config.sdpSemantics = "plan-b";
 
         var peer = new window.RTCPeerConnection(config);