diff --git a/trunk/src/app/srs_app_forward.hpp b/trunk/src/app/srs_app_forward.hpp
index 84de16460..8e2dacd77 100644
--- a/trunk/src/app/srs_app_forward.hpp
+++ b/trunk/src/app/srs_app_forward.hpp
@@ -47,6 +47,7 @@ class SrsKbps;
 /**
 * forward the stream to other servers.
 */
+// TODO: FIXME: refine the error log, comments it.
 class SrsForwarder : public ISrsThreadHandler
 {
 private: