diff --git a/hardware/arduino/pins/mega/pins_arduino.h b/hardware/arduino/pins/mega/pins_arduino.h
index e3785e42f..acbd28f8b 100644
--- a/hardware/arduino/pins/mega/pins_arduino.h
+++ b/hardware/arduino/pins/mega/pins_arduino.h
@@ -32,6 +32,10 @@ const static uint8_t MOSI = 51;
 const static uint8_t MISO = 50;
 const static uint8_t SCK  = 52;
 
+const static uint8_t SDA = 20;
+const static uint8_t SCL = 21;
+const static uint8_t LED = 13;
+
 const static uint8_t A0 = 54;
 const static uint8_t A1 = 55;
 const static uint8_t A2 = 56;
diff --git a/hardware/arduino/pins/standard/pins_arduino.h b/hardware/arduino/pins/standard/pins_arduino.h
index 8fabb1781..b42755d04 100644
--- a/hardware/arduino/pins/standard/pins_arduino.h
+++ b/hardware/arduino/pins/standard/pins_arduino.h
@@ -32,6 +32,10 @@ const static uint8_t MOSI = 11;
 const static uint8_t MISO = 12;
 const static uint8_t SCK  = 13;
 
+const static uint8_t SDA = 18;
+const static uint8_t SCL = 19;
+const static uint8_t LED = 13;
+
 const static uint8_t A0 = 14;
 const static uint8_t A1 = 15;
 const static uint8_t A2 = 16;