diff --git a/README.md b/README.md
index 1a6b7cf..d1dfd68 100644
--- a/README.md
+++ b/README.md
@@ -92,3 +92,6 @@ Skopiuj katalog [etc/editor/musique-vscode](etc/editor/musique-vscode) do folder
 
 - Creator of [tl::expected](https://github.com/TartanLlama/expected) - [Sy Brand](https://sybrand.ink/)
 - Creator of [bestline](https://github.com/jart/bestline) - [Justine Tunney](https://justinetunney.com/)
+- Creator of [rtmidi](https://github.com/thestk/rtmidi/) - [Gary P. Scavone](http://www.music.mcgill.ca/~gary/)
+
+and all contributors that created libraries above.
diff --git a/musique/main.cc b/musique/main.cc
index 2e5e424..2d57a21 100644
--- a/musique/main.cc
+++ b/musique/main.cc
@@ -76,6 +76,7 @@ static T pop(std::span<char const*> &span)
 		"Thanks to:\n"
 		"  Sy Brand, https://sybrand.ink/, creator of tl::expected https://github.com/TartanLlama/expected\n"
 		"  Justine Tunney, https://justinetunney.com, creator of bestline readline library https://github.com/jart/bestline\n"
+		"  Gary P. Scavone, http://www.music.mcgill.ca/~gary/, creator of rtmidi https://github.com/thestk/rtmidi\n"
 		;
 	std::exit(1);
 }
diff --git a/musique/midi/rt_midi.cc b/musique/midi/rt_midi.cc
index ed824c1..ac9adb5 100644
--- a/musique/midi/rt_midi.cc
+++ b/musique/midi/rt_midi.cc
@@ -1,6 +1,12 @@
 #include <musique/midi/midi.hh>
 #include <musique/errors.hh>
 
+// Copyright notice for RtMidi library
+__asm__(R"license(.ident  "\
+RtMidi: realtime MIDI i/o C++ classes\
+Copyright (c) 2003-2021 Gary P. Scavone"
+)license");
+
 void midi::Rt_Midi::list_ports(std::ostream &out) const
 try {
 	RtMidiIn input;