diff --git a/src/time.cpp b/src/time.cpp
index 7c3282b..b2d7f80 100644
--- a/src/time.cpp
+++ b/src/time.cpp
@@ -5,7 +5,8 @@
  *      Author: wn
  */
 #include <msp430g2553.h>
-#include <isr_compat.h>
+// #include <isr_compat.h>
+#include <signal.h>
 #include <stdint.h>
 
 #include "time.h"
@@ -18,7 +19,8 @@ uint16_t pwmVal = 128;
 volatile uint16_t onTime = 500;
 volatile uint16_t offTime = 200;
 
-ISR(TIMER0_A0, TA0_ISR) {
+// ISR(TIMER0_A0, TA0_ISR) {
+interrupt (TIMER0_A0_VECTOR) timer0a0_isr(void) {
     tickCnt++;
 
 	static uint8_t state0 = 0;