diff --git a/hardware/cores/arduino/WInterrupts.c b/hardware/cores/arduino/WInterrupts.c
index bcee7b719..8b9003fb6 100755
--- a/hardware/cores/arduino/WInterrupts.c
+++ b/hardware/cores/arduino/WInterrupts.c
@@ -78,12 +78,12 @@ void attachInterruptTwi(void (*userFunc)(void) ) {
 }
 */
 
-SIGNAL(SIG_INTERRUPT0) {
+SIGNAL(INT0_vect) {
   if(intFunc[EXTERNAL_INT_0])
     intFunc[EXTERNAL_INT_0]();
 }
 
-SIGNAL(SIG_INTERRUPT1) {
+SIGNAL(INT1_vect) {
   if(intFunc[EXTERNAL_INT_1])
     intFunc[EXTERNAL_INT_1]();
 }
diff --git a/hardware/cores/arduino/wiring.c b/hardware/cores/arduino/wiring.c
index 19f348c33..157d1d2b6 100755
--- a/hardware/cores/arduino/wiring.c
+++ b/hardware/cores/arduino/wiring.c
@@ -27,7 +27,7 @@
 volatile unsigned long timer0_clock_cycles = 0;
 volatile unsigned long timer0_millis = 0;
 
-SIGNAL(SIG_OVERFLOW0)
+SIGNAL(TIMER0_OVF_vect)
 {
 	// timer 0 prescale factor is 64 and the timer overflows at 256
 	timer0_clock_cycles += 64UL * 256UL;
diff --git a/hardware/cores/arduino/wiring_serial.c b/hardware/cores/arduino/wiring_serial.c
index 2dd242b80..6c576d564 100755
--- a/hardware/cores/arduino/wiring_serial.c
+++ b/hardware/cores/arduino/wiring_serial.c
@@ -107,7 +107,7 @@ void serialFlush()
 #if defined(__AVR_ATmega8__)
 SIGNAL(SIG_UART_RECV)
 #else
-SIGNAL(SIG_USART_RECV)
+SIGNAL(USART_RX_vect)
 #endif
 {
 #if defined(__AVR_ATmega8__)