diff --git a/hardware/arduino/cores/arduino/HardwareSerial.h b/hardware/arduino/cores/arduino/HardwareSerial.h
index 699015af6..07445a09b 100644
--- a/hardware/arduino/cores/arduino/HardwareSerial.h
+++ b/hardware/arduino/cores/arduino/HardwareSerial.h
@@ -17,7 +17,7 @@
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
   Modified 28 September 2010 by Mark Sproul
-  Modified 12 August 2012 by Alarus
+  Modified 14 August 2012 by Alarus
 */
 
 #ifndef HardwareSerial_h
@@ -52,7 +52,7 @@ class HardwareSerial : public Stream
       volatile uint8_t *ucsrc, volatile uint8_t *udr,
       uint8_t rxen, uint8_t txen, uint8_t rxcie, uint8_t udrie, uint8_t u2x);
     void begin(unsigned long);
-    void begin(unsigned long, byte, char, byte);
+    void begin(unsigned long, byte);
     void end();
     virtual int available(void);
     virtual int peek(void);
@@ -63,6 +63,56 @@ class HardwareSerial : public Stream
     operator bool();
 };
 
+// Define config for Serial.begin(baud, config);
+#define _5n1_ 0x80
+#define _5N1_ 0x80
+#define _6n1_ 0x82
+#define _6N1_ 0x82
+#define _7n1_ 0x84
+#define _7N1_ 0x84
+#define _8n1_ 0x86
+#define _8N1_ 0x86
+#define _5n2_ 0x88
+#define _5N2_ 0x88
+#define _6n2_ 0x8A
+#define _6N2_ 0x8A
+#define _7n2_ 0x8C
+#define _7N2_ 0x8C
+#define _8n2_ 0x8E
+#define _8N2_ 0x8E
+#define _5e1_ 0xA0
+#define _5E1_ 0xA0
+#define _6e1_ 0xA2
+#define _6E1_ 0xA2
+#define _7e1_ 0xA4
+#define _7E1_ 0xA4
+#define _8e1_ 0xA6
+#define _8E1_ 0xA6
+#define _5e2_ 0xA8
+#define _5E2_ 0xA8
+#define _6e2_ 0xAA
+#define _6E2_ 0xAA
+#define _7e2_ 0xAC
+#define _7E2_ 0xAC
+#define _8e2_ 0xAE
+#define _8E2_ 0xAE
+#define _5o1_ 0xB0
+#define _5O1_ 0xB0
+#define _6o1_ 0xB2
+#define _6O1_ 0xB2
+#define _7o1_ 0xB4
+#define _7O1_ 0xB4
+#define _8o1_ 0xB6
+#define _8O1_ 0xB6
+#define _5o2_ 0xB8
+#define _5O2_ 0xB8
+#define _6o2_ 0xBA
+#define _6O2_ 0xBA
+#define _7o2_ 0xBC
+#define _7O2_ 0xBC
+#define _8o2_ 0xBE
+#define _8O2_ 0xBE
+
 #if defined(UBRRH) || defined(UBRR0H)
   extern HardwareSerial Serial;
 #elif defined(USBCON)