diff --git a/doc/usb-midi.md b/doc/usb-midi.md
new file mode 100644
index 0000000..0c19f68
--- /dev/null
+++ b/doc/usb-midi.md
@@ -0,0 +1,16 @@
+# Using the library for MIDI through USB
+
+Some boards have "native" USB functionality, which means they can directly
+connect to a computer and appear as a USB MIDI device.
+
+Here are the officially supported boards:
+
+-   Arduino Leonardo
+-   Arduino Due
+
+## Pre-requisites
+
+To use USB MIDI to send messages to the computer, you must disable Running
+Status in the settings. This is because the USB transport is stateless and has
+no knowledge of the last message's running status.
+The setting is off by default, so if you use custom settings, keep that in mind.
diff --git a/src/midi_Settings.h b/src/midi_Settings.h
index 1951944..493a3b3 100644
--- a/src/midi_Settings.h
+++ b/src/midi_Settings.h
@@ -50,6 +50,7 @@ struct DefaultSettings
 {
     /*! Running status enables short messages when sending multiple values
     of the same type and channel.\n
+    Must be disabled to send USB MIDI messages to a computer
     Warning: does not work with some hardware, enable with caution.
     */
     static const bool UseRunningStatus = false;