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-rwxr-xr-xcores/arduino/wiring.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/cores/arduino/wiring.h b/cores/arduino/wiring.h
index 6f61293..0118618 100755
--- a/cores/arduino/wiring.h
+++ b/cores/arduino/wiring.h
@@ -26,6 +26,7 @@
#define Wiring_h
#include <avr/io.h>
+#include <stdlib.h>
#include "binary.h"
#ifdef __cplusplus