diff --git a/usart.h b/usart.h
index 0cb032b..224f8cf 100644
--- a/usart.h
+++ b/usart.h
@@ -13,7 +13,7 @@
 #include <string.h>
 #include "../clock.h"
 
-#if defined (__AVR_ATmega168A__) || defined (__AVR_ATmega328P__) || defined (__AVR_ATmega644P__) || defined (__AVR_ATmega1284P__)
+#if defined (__AVR_ATmega168A__) || defined (__AVR_ATmega328P__) || defined (__AVR_ATmega644P__)
 #define USART_SPI
 #define USART0_RX_vect_D USART_RX_vect
 #define USART0_UDRE_vect_D USART_UDRE_vect
@@ -24,6 +24,7 @@
 #define USART0_UDRE_vect_D USART_UDRE_vect
 #endif
 #if defined (__AVR_ATmega1284P__)
+#define USART_SPI
 #define SECOND_USART
 #define USART0_RX_vect_D USART0_RX_vect
 #define USART1_RX_vect_D USART1_RX_vect
@@ -133,9 +134,9 @@ private:
 	Parity getParity();
 	StopBit getStopBits();
 
+public:
 	~USART0();
 
-public:
 	static USART0& inst();
 	USART0( const USART0& ) = delete;
 	void operator=( const USART0& ) = delete;