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-rw-r--r--variants/robot_motor/pins_arduino.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/variants/robot_motor/pins_arduino.h b/variants/robot_motor/pins_arduino.h
index cde2f3f..8179ac3 100644
--- a/variants/robot_motor/pins_arduino.h
+++ b/variants/robot_motor/pins_arduino.h
@@ -89,7 +89,7 @@ static const uint8_t TK4 = 12; // A11
extern const uint8_t PROGMEM analog_pin_to_channel_PGM[];
#define analogPinToChannel(P) ( pgm_read_byte( analog_pin_to_channel_PGM + (P) ) )
-#define digitalPinToInterrupt(p) ((p) == 0 ? 2 : ((p) == 1 ? 3 : ((p) == 2 ? 1 : ((p) == 3 ? 0 : ((p) == 7 ? 4 : -1)))))
+#define digitalPinToInterrupt(p) ((p) == 0 ? 2 : ((p) == 1 ? 3 : ((p) == 2 ? 1 : ((p) == 3 ? 0 : ((p) == 7 ? 4 : NOT_AN_INTERRUPT)))))
#ifdef ARDUINO_MAIN