diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 7dc7b16..ef00cf1 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -5,6 +5,10 @@ add_library(midi STATIC
     midi_Defs.h
     midi_Message.h
     midi_Settings.h
+    midi_RingBuffer.h
+    midi_RingBuffer.hpp
+    midi_UsbTransport.h
+    midi_UsbTransport.hpp
     MIDI.cpp
     MIDI.hpp
     MIDI.h