diff --git a/CHANGELOG.md b/CHANGELOG.md
index e4979a3f..9e5fbc1f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Fixed
 
+- Fix missing `LED_BUILTIN` definition for Arduino Due, Zero and Circuit Playground.
+
 ### Security
 
 
diff --git a/cpp/arduino/ArduinoDefines.h b/cpp/arduino/ArduinoDefines.h
index 9490d469..ef80d546 100644
--- a/cpp/arduino/ArduinoDefines.h
+++ b/cpp/arduino/ArduinoDefines.h
@@ -89,7 +89,7 @@
 #define TIMER5B 17
 #define TIMER5C 18
 
-#if defined(__AVR_ATmega328P__) || defined(__AVR_ATmega32U4__) || defined(__AVR_ATmega328__) || defined(__AVR_ATmega168__) || defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
+#if defined(__AVR_ATmega328P__) || defined(__AVR_ATmega32U4__) || defined(__AVR_ATmega328__) || defined(__AVR_ATmega168__) || defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__) || defined(__SAM3X8E__) || defined(__SAMD21G18A__)
   #define LED_BUILTIN 13
 #endif