diff --git a/hardware/arduino/sam/cores/arduino/USB/CDC.cpp b/hardware/arduino/sam/cores/arduino/USB/CDC.cpp
index 76e17e8f5..84a4e9132 100644
--- a/hardware/arduino/sam/cores/arduino/USB/CDC.cpp
+++ b/hardware/arduino/sam/cores/arduino/USB/CDC.cpp
@@ -149,6 +149,10 @@ void Serial_::begin(uint32_t baud_count)
 {
 }
 
+void Serial_::begin(uint32_t baud_count, uint8_t config)
+{
+}
+
 void Serial_::end(void)
 {
 }
diff --git a/hardware/arduino/sam/cores/arduino/USB/USBAPI.h b/hardware/arduino/sam/cores/arduino/USB/USBAPI.h
index 0493c7b66..3cf601e9e 100644
--- a/hardware/arduino/sam/cores/arduino/USB/USBAPI.h
+++ b/hardware/arduino/sam/cores/arduino/USB/USBAPI.h
@@ -49,6 +49,7 @@ private:
 	RingBuffer *_cdc_rx_buffer;
 public:
 	void begin(uint32_t baud_count);
+	void begin(uint32_t baud_count, uint8_t config);
 	void end(void);
 
 	virtual int available(void);