#ifdef CONFIG_MODULE_SCHEDULER_TIMER0
+#ifndef TIMER0_OVF_vect
#if defined(SIG_OVERFLOW0)
-SIGNAL(SIG_OVERFLOW0)
-#else
-SIGNAL(TIMER0_OVF_vect)
+#define TIMER0_OVF_vect SIG_OVERFLOW0
+#endif
#endif
+SIGNAL(TIMER0_OVF_vect)
{
scheduler_interrupt();
}