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-rw-r--r--variants/mega/pins_arduino.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/variants/mega/pins_arduino.h b/variants/mega/pins_arduino.h
index 124444f..9b43971 100644
--- a/variants/mega/pins_arduino.h
+++ b/variants/mega/pins_arduino.h
@@ -83,6 +83,8 @@
( (((p) >= 62) && ((p) <= 69)) ? ((p) - 62) : \
0 ) ) ) ) ) )
+#define digitalPinToInterrupt(p) ((p) == 2 ? 0 : ((p) == 3 ? 1 : ((p) >= 18 && (p) <= 21 ? 23 - (p) : NOT_AN_INTERRUPT)))
+
#ifdef ARDUINO_MAIN
const uint16_t PROGMEM port_to_mode_PGM[] = {