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-rwxr-xr-xcores/arduino/wiring.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/cores/arduino/wiring.h b/cores/arduino/wiring.h
index 0118618..7245797 100755
--- a/cores/arduino/wiring.h
+++ b/cores/arduino/wiring.h
@@ -58,7 +58,7 @@ extern "C"{
#define FALLING 2
#define RISING 3
-#if defined(__AVR_ATmega1280__)
+#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
#define INTERNAL1V1 2
#define INTERNAL2V56 3
#else