1 files changed, 1 insertions, 0 deletions
diff --git a/cores/arduino/HardwareSerial.h b/cores/arduino/HardwareSerial.h
index cae1447..884f9fe 100755
--- a/cores/arduino/HardwareSerial.h
+++ b/cores/arduino/HardwareSerial.h
@@ -49,6 +49,7 @@ class HardwareSerial : public Stream
     void begin(long);
     void end();
     virtual uint8_t available(void);
+    virtual int peek(void);
     virtual int read(void);
     virtual void flush(void);
     virtual void write(uint8_t);