--- a/drivers/timers_unix/timers_unix.c
+++ b/drivers/timers_unix/timers_unix.c
@@ -33,7 +33,7 @@
 	}
 }
 
-void timer_notify(sigval_t val)
+void timer_notify(void)
 {
 	if(gettimeofday(&last_sig,NULL)) {
 		perror("gettimeofday()");
