diff --git a/ipc/ipc_message_start.h b/ipc/ipc_message_start.h
index 3b7362e..3992307 100644
--- a/ipc/ipc_message_start.h
+++ b/ipc/ipc_message_start.h
@@ -82,6 +82,7 @@
   WebRtcLoggingMsgStart,
   TtsMsgStart,
   MemoryBenchmarkMsgStart,
+  WebSocketMsgStart,
   LastIPCMsgStart      // Must come last.
 };