diff --git a/hardware/arduino/sam/variants/arduino_due_x/variant.h b/hardware/arduino/sam/variants/arduino_due_x/variant.h
index 8c4f25120..000ac96aa 100644
--- a/hardware/arduino/sam/variants/arduino_due_x/variant.h
+++ b/hardware/arduino/sam/variants/arduino_due_x/variant.h
@@ -69,6 +69,7 @@ extern "C"{
 #define PIN_LED              PIN_LED_13
 #define PIN_LED2             PIN_LED_RXL
 #define PIN_LED3             PIN_LED_TXL
+#define LED_BUILTIN          13
 
 /*
  * SPI Interfaces