diff --git a/core/plugins/tracing/TracingPlugin.hpp b/core/plugins/tracing/TracingPlugin.hpp
index 92d34d2a..b4f36f12 100644
--- a/core/plugins/tracing/TracingPlugin.hpp
+++ b/core/plugins/tracing/TracingPlugin.hpp
@@ -25,6 +25,7 @@
  *           are delivered?
  * FIXME: trace a sequence of pb messages, not a giant single one (pb weren't
  *        made for huge messages)
+ * FIXME: destructor -> removeFlow?
  */
 class TracingPlugin : public fi::ExperimentFlow
 {