diff --git a/RELICENSE/timblechmann.md b/RELICENSE/timblechmann.md
new file mode 100644
index 00000000..df13dbda
--- /dev/null
+++ b/RELICENSE/timblechmann.md
@@ -0,0 +1,16 @@
+# Permission to Relicense under MPLv2 or any other OSI approved license chosen by the current ZeroMQ BDFL
+
+This is a statement by Tim Blechmann that grants permission to
+relicense its copyrights in the libzmq C++ library (ZeroMQ) under the
+Mozilla Public License v2 (MPLv2) or any other Open Source Initiative
+approved license chosen by the current ZeroMQ BDFL (Benevolent
+Dictator for Life).
+
+A portion of the commits made by the Github handle "timblechmann", with
+commit author "Tim Blechmann <tim@klingt.org>", are
+copyright of Tim Blechmann.  This document hereby grants the libzmq
+project team to relicense libzmq, including all past, present and
+future contributions of the author listed above.
+
+Tim Blechmann
+2021/09/21
diff --git a/src/session_base.hpp b/src/session_base.hpp
index c2e6d098..e96e0533 100644
--- a/src/session_base.hpp
+++ b/src/session_base.hpp
@@ -113,7 +113,7 @@ class session_base_t : public own_t, public io_object_t, public i_pipe_events
     void process_plug () ZMQ_FINAL;
     void process_attach (zmq::i_engine *engine_) ZMQ_FINAL;
     void process_term (int linger_) ZMQ_FINAL;
-    void process_conn_failed ();
+    void process_conn_failed () ZMQ_OVERRIDE;
 
     //  i_poll_events handlers.
     void timer_event (int id_) ZMQ_FINAL;
diff --git a/src/stream_engine_base.hpp b/src/stream_engine_base.hpp
index 58bf9579..05bcc659 100644
--- a/src/stream_engine_base.hpp
+++ b/src/stream_engine_base.hpp
@@ -73,7 +73,7 @@ class stream_engine_base_t : public io_object_t, public i_engine
 
     //  i_poll_events interface implementation.
     void in_event () ZMQ_FINAL;
-    void out_event ();
+    void out_event () ZMQ_OVERRIDE;
     void timer_event (int id_) ZMQ_FINAL;
 
   protected: