diff --git a/hardware/arduino/avr/variants/gemma/pins_arduino.h b/hardware/arduino/avr/variants/gemma/pins_arduino.h
index 0af67c61c..b6aed39fb 100644
--- a/hardware/arduino/avr/variants/gemma/pins_arduino.h
+++ b/hardware/arduino/avr/variants/gemma/pins_arduino.h
@@ -42,7 +42,9 @@
 //            GND  4|    |5  PB0 (D 0) pwm0
 //                  +----+
 
-#define LED_BUILTIN 1
+#define NUM_DIGITAL_PINS            3
+#define NUM_ANALOG_INPUTS           1
+#define LED_BUILTIN 								1
 
 static const uint8_t A0 = 6;
 static const uint8_t A1 = 7;