diff --git a/build/shared/examples/Digital/toneKeyboard/toneKeyboard.pde b/build/shared/examples/Digital/toneKeyboard/toneKeyboard.pde
index b2f88b605..21eb1aed6 100644
--- a/build/shared/examples/Digital/toneKeyboard/toneKeyboard.pde
+++ b/build/shared/examples/Digital/toneKeyboard/toneKeyboard.pde
@@ -10,6 +10,8 @@
  
  created 21 Jan 2010
  by Tom Igoe 
+
+This example code is in the public domain.
  
  http://arduino.cc/en/Tutorial/Tone3