diff --git a/pkg/proto/sdk_ws/ws.proto b/pkg/proto/sdk_ws/ws.proto
index 380287d12..2196bc645 100644
--- a/pkg/proto/sdk_ws/ws.proto
+++ b/pkg/proto/sdk_ws/ws.proto
@@ -384,6 +384,8 @@ message InvitationInfo  {
     int32 timeout = 6;
     string mediaType = 7;
      int32 PlatformID = 8;
+    int32   sessionType = 9;
+
 
 }