diff --git a/examples/arduino-blink/platformio.ini b/examples/arduino-blink/platformio.ini
index adf7dd2..ef4c39e 100644
--- a/examples/arduino-blink/platformio.ini
+++ b/examples/arduino-blink/platformio.ini
@@ -40,6 +40,3 @@ platform = espressif32
 framework = arduino
 board = esp32-s3-devkitc-1
 monitor_speed = 115200
-build_flags =
-	-D LED_BUILTIN=2
-
diff --git a/examples/arduino-blink/src/Blink.cpp b/examples/arduino-blink/src/Blink.cpp
index 1b1c30f..5981d69 100644
--- a/examples/arduino-blink/src/Blink.cpp
+++ b/examples/arduino-blink/src/Blink.cpp
@@ -7,7 +7,9 @@
 #include <Arduino.h>
 
 // Set LED_BUILTIN if it is not defined by Arduino framework
-// #define LED_BUILTIN 2
+#ifndef LED_BUILTIN
+    #define LED_BUILTIN 2
+#endif
 
 void setup()
 {