diff --git a/examples/11.ArduinoISP/ArduinoISP/ArduinoISP.ino b/examples/11.ArduinoISP/ArduinoISP/ArduinoISP.ino
index bbbcdc9..6ceb85f 100644
--- a/examples/11.ArduinoISP/ArduinoISP/ArduinoISP.ino
+++ b/examples/11.ArduinoISP/ArduinoISP/ArduinoISP.ino
@@ -3,6 +3,10 @@
 // If you require a license, see
 // https://opensource.org/licenses/bsd-license.php
 //
+// Note that this sketch refers to the SPI bus pins using the legacy MISO/MOSI
+// names rather than the modern CIPO/COPI names.
+// For further details, see https://docs.arduino.cc/learn/communication/spi
+//
 // This sketch turns the Arduino into a AVRISP using the following Arduino pins:
 //
 // Pin 10 is used to reset the target microcontroller.