diff --git a/include/chaiscript/chaiscript_threading.hpp b/include/chaiscript/chaiscript_threading.hpp
index 26ce7d8..09fc617 100644
--- a/include/chaiscript/chaiscript_threading.hpp
+++ b/include/chaiscript/chaiscript_threading.hpp
@@ -155,6 +155,7 @@ namespace chaiscript
 
 
           private:
+            /// \todo this leaks thread instances. It needs to be culled from time to time
             std::shared_ptr<T> get_tls() const
             {
               unique_lock<mutex> lock(m_mutex);